Heavy truck cooling and heat dissipation know how much coolant is the most critical.

The function of automobile cooling system is to dissipate the heat in time to make the engine work at the most suitable temperature. The ideal automobile cooling system should not only meet the needs of engine cooling, but also reduce heat loss and energy consumption, so that the engine can have better energy-saving effect on the basis of ensuring good power performance.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

First, the working principle of the cooling system

The cooling system plays a very important role in the automobile. The engine cooling system generally adopts water cooling. The typical cooling system consists of radiator, radiator hose, thermostat, water pump, cooling fan and fan belt.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

It relies on the cooling water pump, flows through the oil cooler and crankcase cooling water jacket, enters the cylinder head, and takes away the excess heat of the engine.

Great cycle:When the engine works under normal thermal state, that is, the water temperature is higher than 80℃, the cooling water should all flow through the radiator to form a large cycle. The main valve of the thermostat is fully opened, while the control valve completely closes the bypass hole.

Small cycle:When the cooling water temperature is lower than 70℃, the steam pressure in the expansion tank is very small, and the cooling water does not flow through the radiator, but only circulates between the water jacket and the water pump.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Second, the role of coolant

Coolant plays a very important role in the normal operation of the engine. Too high or too low coolant temperature will have an adverse impact on the engine. If the engine coolant temperature is too high and the viscosity of lubricating oil decreases, the friction loss of engine parts will increase.

If the engine coolant temperature is too low, the viscosity of lubricating oil will increase and the fluidity will deteriorate, which is also not conducive to lubrication, thus reducing the power output of the engine and affecting the mechanical efficiency of the engine.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Coolant is the heat transfer medium in the cooling system, which has the functions of cooling, anti-corrosion, anti-scaling and anti-freezing. It is composed of water, antifreeze and various additives.

1. Water is an important part of cooling liquid, which has large specific heat capacity and fast heat conduction, and the heat absorbed by water is easy to dissipate.

2. Antifreeze is used to reduce the freezing point of coolant. Because of the high freezing point of water, it is easy to freeze when used in cold and low temperature weather. Adding a certain amount of antifreeze can reduce its freezing point and meet the harsh working conditions.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

3. Other additives

Additives generally do not exceed 5%, mainly corrosion inhibitors, buffers, scale inhibitors, defoamers and colorants.

(1) Corrosion inhibitor:It can effectively prevent the corrosion of metal substances in the cooling system, because the cooling pipeline is mainly composed of metal parts, and it is easy to corrode under the conditions of high pressure, thermal load and corrosive medium, which will damage the cooling system.

(2) Scale inhibitor:It can effectively remove the scale and improve the heat dissipation capacity. During the use of cooling liquid, scale often forms on the inner surface of the cooling system, and the thermal conductivity of scale is lower than that of metal, which seriously affects the normal heat dissipation.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

(3) Defoamer:It can effectively prevent foaming. When the coolant is forced to circulate under the high speed of the water pump, it usually produces foam. A large amount of foam not only affects the heat transfer efficiency, but also aggravates the cavitation corrosion of the water pump.

(4) Colorant:In the process of using coolant, it is generally required to add certain coloring agent to make the coolant have eye-catching color. In this way, when the cooling system fails, the location of leakage can be easily judged by observing the external pipeline of the cooling system.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Third, the classification of coolant

Engine coolant is divided into ethylene glycol coolant and propylene glycol coolant according to antifreeze:

1. The specific heat capacity, thermal conductivity, viscosity and boiling point of ethylene glycol are all important parameters that affect the heat transfer performance of ethylene glycol aqueous solution. The specific heat capacity and thermal conductivity of ethylene glycol aqueous solution decrease with the increase of concentration, while the viscosity increases with the increase of concentration.

2. The performance of propylene glycol in reducing freezing point is basically the same as that of ethylene glycol, and it is less toxic and more expensive than ethylene glycol.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Fourth, the maintenance of the cooling system

1. Selection of coolant

(1) In order to prevent the cooling system from freezing, appropriate antifreeze can be selected. Generally, the freezing point of antifreeze should be 5℃ lower than the lowest temperature in the use area.

(2) Different types of antifreeze cannot be mixed.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

2. Replacement cycle and dosage

(1) Replacement cycle:Generally, the coolant needs to be replaced once every 2-3 years, specifically according to the instruction manual.

(2) Addition dosage:The antifreeze should be added between the marks F(MAX) and L(MIN) of the expansion tank in the engine cooling state.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

3. Daily maintenance:

(1) Pay more attention to daily observation. Once the coolant is insufficient, the surface of the water pipe shows signs of whitening or there is white emulsion in it, the coolant leaks.

(2) Check the connection position and state of all cooling system hoses and heater hoses, and replace them in time if they swell or deteriorate.

Heavy truck cooling and heat dissipation know how much coolant is the most critical.

Summary: The cooling system plays a very important role in the car. In daily use, Ying Qin should take care of it to prevent problems before they happen and keep the car in a good state. Always check whether the engine coolant is sufficient, and add or replace the appropriate coolant in time when necessary.

AT gearbox with a price of 91,800 yuan.

Located in the pickup truck, the car has attracted much attention since its debut. Recently, the Dongfeng family has upgraded its brand-new model, and its overall quality has been significantly improved, which has made many fans quite excited. In terms of appearance, the overall design of 6 is tough, the whole front face looks domineering, the headlights on both sides are sharp, and the internal light groups are patchy, and they are bright when lit. The side is still the unique design of Dongfeng, and the enchanting figure is displayed incisively and vividly! The new car’s butt is very round, with a tendency to protrude backwards, which is very playful, and the style of taillights is equally amazing, especially the brake lights, which echo each other with the daytime lights.

In terms of interior, this car is also very classy. The large leather coverage of the steering wheel brings a good sense of luxury. The soft material package area in the central control area is not small, and the materials and workmanship are exquisite. It is equipped with a 7.0-inch central control LCD screen with clear display and relatively young design. The front row is also equipped with an automatic air conditioning control system to freely debug the most comfortable space atmosphere. And there are graded ergonomic seats.

The length, width and height are 5310×1850×1810mm respectively, and the wheelbase has reached 3150mm. In the same class, the wheelbase of Ruiqi 6 ranks 16th. Among the models of the same price and class, the trunk volume of Ruiqi 6 ranks 14th. The space is relatively regular, without obvious protrusions, and the overall loading capacity is good.

Ruiqi 62.3T flagship diesel engine with automatic four-wheel drive adopts 2.3 engine, with maximum horsepower of 163 and peak torque of 380, which is matched with automatic manual transmission (AT). It will definitely bring unforgettable control charm. Ranked 10 th among 80,000-120,000 pickup trucks.

The active/passive safety configuration of Ruiqi 6 is complete, includingAutomatic parkingZero tire pressure endurance tireAutomatic parkingSteep slope descenthill start assist controlknee airbagHUD head-up displayAnti-lock braking (ABS)Braking force distribution (EBD/CBC, etc.)Brake assist (EBA/BAS, etc.)Traction control (ASR/TCS, etc.)Active noise reductionEngine start and stopSide safety air curtainWireless charging of mobile phonenight vision systemLED daytime running lightsForward reversing radarTire pressure monitoringSteering wheel heatingBody stability control (ESP/DSC, etc.)Rear reversing radarFatigue reminderRemote parkingChild seat interfaceLane keeping (LKAS)Equal configuration.

Among them,Automatic parkingYou can avoid stepping on the brakes for a long time or needing to pull frequently;Steep slope descentCan safely pass through steep slope road conditions at low speed;knee airbagReduce the injury of the car interior to the occupant’s knees in the secondary collision.

In order to get a more comprehensive and objective understanding of Ruiqi 6, you can go to the forum of Yiqi Ruiqi 6 and browse the messages of users who have bought the car in history.

Nongfu Spring is not as good as tap water?

  On the one hand, China Resources Yibao encountered a PH test strip, and on the other hand, Nongfu Spring was accused of being "not as good as tap water". The "two bottles of water" with growing grievances finally broke out in a full-scale "water battle" at the turn of this spring and summer. Recently, the war of words and words between the two sides is not enough, and the next battle will be in court.

  Nongfu Spring is negative and frequent, blame Yibao

  In the past month, Nongfu Spring has been exposed to mildew in bottled natural water, black unknown objects, brown floating objects, garbage siege in the water source, and different colors of the same batch of products. On April 10, another "industry insider" broke the news that Nongfu Spring’s standard is not as good as tap water.

  This series of quality disturbances has raised questions about Nongfu Spring. On April 11, Nongfu Spring finally couldn’t help but jump out and issue a statement, directly accusing the series of reports against Nongfu Spring of being deliberately planned, hidden behind the scenes is the state-controlled drinking water company, China Resources Yibao. In fact, when the water source of Nongfu Spring was exposed to garbage siege, Nongfu Spring pointed out that "this matter was done by a competitor", but did not directly name the competitor at that time.

  Observing the series ** publicity actions ** Yibao in recent times, it seems that there is "suspicion". After March 15 this year, China Resources Yibao once cooperated with a large portal website to launch the special topic ** "The Sadness ** Drinking Water in China", and published the same content advertisement in elevators and other channels. It listed all the water pollution incidents in China in the past 10 years, and then pointed out that "Do you still dare to drink the water transported by nature?" The target pointed to the well-known Nongfu ****** advertising slogan – "Nature’s Porter". The relevant website has now removed the topic. Since then, in the process ** Nongfu ****** being exposed to the pollution problem ** the water source ** the Danjiangkou, the figure ** China Resources Yibao has also emerged. On April 9, Yibao held a press conference in *******, the main content ** which was the responsibility ** drinking water enterprises to protect water sources and the need for water sources to meet drinking water standards.

  In its statement, Nongfu Spring also listed "criminal evidence" of Yibao, as competitors in Hunan, Guangdong, Sichuan, Chongqing, Hubei and other places have hired people to distribute leaflets attacking Nongfu Spring to retail stores and consumers door-to-door.

  More interestingly, there was a speculation circulating in the industry that Nongfu Spring’s recent troubles were similar to the way it had attacked its competitors in the past. Coincidentally, one of Nongfu Spring’s executives had moved to China Resources Yibao…

  However, Li Kai, the marketing director of China Resources Yibao, told reporters that he denied all kinds of speculation from the outside world, saying that the company would not do anything that violates fair competition.

  Yibao retorted, and a scolding war broke out

  Nongfu Spring has set off the climax of this round of war of words since the 11th, and released 17 long Weibo in a row in just 6 days from the 11th to the 16th.

  Moreover, Nongfu Spring is not satisfied with the theory of "naming", but also poses a posture of death and destruction. The official Weibo of Nongfu Spring has publicly recruited no less than 5,000 people, "to go to Bunongfu Spring and China Resources Yibao, which uses tap water as its water source, to compare the quality of all water sources, factories and products."

  Citizen Mr. Liu told reporters that he had forwarded the above-mentioned Weibo and had received a private message invitation from the official Weibo of Nongfu Spring on the 16th.

  This move made China Resources Yibao furious. At 1 noon on April 12, the official Weibo of China Resources Yibao posted a message: "People are not sages, who can be wrong! If you can change it, you can’t be good. ‘This is the case in life, and even more so in business! Advise a certain enterprise to be responsible to consumers and have the courage to take responsibility. Instead of the disaster moving eastward and grabbing the disaster on others!" Weibo. Although this Weibo did not specify the target, it was unanimously regarded by the outside world as a call to Nongfu Spring.

  In fact, China Resources Yibao has been holding back its breath for a long time. On March 22 this year, "International Water Day", Nongfu Spring was witnessed to do a demonstration of the pH value of bottled water at several major subway entrances in Guangzhou, and the bottled water for consumers to compare was Yibao. In the consumer sourcing activity held by Nongfu Spring every year, Yibao was also present at the pH value test site of different brands to be demonstrated by the example sign.

  "Yibao has always been annoyed by the practice of testing Nongfu Spring Water, and it is not impossible to fight back for this matter," a person close to Yibao told reporters. Regarding the recent statement of Nongfu Spring, the relevant person in charge of China Resources Yibao said that this is the usual method of Nongfu Spring. Once there is negative news, it depends on competitors, and before Wahaha and Master Kang. However, the person did not respond positively to Nongfu Spring’s suggestion that consumers were invited to visit the Yibao factory.

  After being ridiculed by the official Weibo of China Resources Yibao, the official Weibo of Nongfu Spring quickly responded: "As a state-owned holding enterprise and a listed company, if China Resources Yibao dares to do it, it must dare to admit it, and maintain the moral bottom line of the enterprise in the hearts of the people. Don’t have the courage to do it, but don’t have the courage to admit it." And used a long Weibo to post a batch of online screenshots, leaflets and other pictures to prove that the series of incidents encountered by the company were carried out by China Resources Yibao.

  Since then, the public war between the two major bottled water giants in China has intensified.

  Yibao sued Nongfu Spring for reputation infringement

  On April 13, China Resources Yibao released an open letter to all China Resources Yibao people, in which it stated that for the deliberate attacks of certain companies, the company will retaliate or use legal weapons to protect itself when appropriate, and also ask employees not to go into muddy waters.

  On the same day, the media reporters received a "100,000 whys of Nongfu Spring" from the marketing director of Yibao: It is said that Qiandao Lake is the tap water source of Chun’an County, Danjiangkou is the tap water source of Danjiangkou citizens, and Wanlv Lake is the power source of Guangdong Xinfengjiang Hydropower Station. What kind of water source is Nongfu Spring? The water sources of Nongfu Spring are deep lake water, deep reservoir water, self-swimming spring, mountain spring water, groundwater… No matter what kind of water, it implements the local standard of natural water in Zhejiang Province. May I ask why? Yibao implements the national unified standard no matter where it is produced. May I ask Nongfu Spring, how can you feel?!

  In this regard, Nongfu Spring said it was "ridiculous", and the quality of Nongfu Spring was much higher than national standards, industry standards and local standards.

  Facts have proved that China Resources Yibao did what it said. On the afternoon of the 16th, China Resources Yibao confirmed in a notice to reporters that the company had filed a lawsuit against Nongfu Spring with the People’s Court of Nanshan District, Shenzhen, which was officially accepted by the court on April 15, 2013.

  The report said that recently, through its official Weibo, Nongfu Spring has claimed that the relevant reports of its own product quality problems recently disclosed by the media are deliberately planned by China Resources Yibao, and that China Resources Yibao uses the public’s panic about food safety and environmental pollution as a marketing tool.

  "The above false statements have not only been widely reposted through social media, but have also been continuously reported by major mainstream media and portal websites across the country, causing serious damage to China Resources Yibao’s reputation, business reputation and commodity reputation." Yibao said that according to the provisions of the civil law, it believes that Nongfu Spring’s behavior has constituted an infringement of China Resources Yibao’s reputation rights and should bear the legal liability for infringement according to law.

  The notice said that it believes in the public and the law will give Yibao a "just result", adding that any company’s actions to infringe on the reputation of competitors will not be successful, and it is not allowed by law. The notice reiterated that the company has firmly opposed, is and will not use illegal means to participate in market competition.

  As of press time, Nongfu Spring’s spokesperson, Mr. Wu, had not responded to the company’s lawsuit against China Resources Yibao, or even did not answer the phone. The official Weibo of Nongfu Spring, which has issued frequent statements to the public in recent days, also said nothing about this.

  Nongfu Spring pinched his peers and pinched the media

  The reporter noticed that since China Resources Yibao issued an open letter to take up legal weapons, the focus ** public opinion on Nongfu ****** has begun to shift. Nongfu ******’s subsequent statements did not name names and China Resources Yibao, but focused on clarifying water quality standards. Instead, they were pinned on the ******* Times.

  The **ficial Weibo ** Nongfu ****** has published several water quality monitoring reports, and the ******* Times, which has repeatedly "named" and questioned its water safety, even released a harsh message on Weibo on the 15th: "You can’t run away, and don’t even think about running."

  In response, "******* Times **ficial Weibo" posted a response on the morning ** the 16th, "In front ** the standard, you can’t run away, and don’t even think about running away." Since the dispute over product standards appeared in the newspapers, Nongfu ****** first accused competitors ** smearing, and then cursed the media for ignorance, but refused to give a tenable reason on the standard issue. Instead, he avoided the reality and repeatedly emphasized that "product quality" is higher than the national standard.

  Subsequently, the **ficial Weibo ** Nongfu ****** issued a "four-fold" ******* Times "Weibo, and posted a" Fourth Statement ** Nongfu ****** "signed on April 16 in the form ** a long Weibo. The content said:" Nongfu ****** products are comprehensively better than GB5749-2006 national tap water standards, ** which 21 indicators are 12-1000 times better than the national standard. Nongfu ****** compared with a full set ** 106 test indicators and 31 internal control indicators, a total ** 137 test reports were fully released. We hope that after the ******* Times sees the test report, should it feel, is your journalistic moral conscience still there? " Nongfu ****** insists that the quality ** the product is higher than any existing drinking water standards in the country, and it is also better than the current tap water standards. The arsenic and cadmium levels in the product are below the detection limit, and the levels are too low to be detected. Mold and yeast are also not detected.

  The Beijing Times V17 published two blogs in a row: one is "to be more serious about water standards and pay attention to the right to health"; the other is "I don’t know why Nongfu Spring doesn’t cooperate with normal interviews?!" The Beijing Times pressed Nongfu Spring: Why did companies abandon higher national standards with universal significance and choose lower local standards?

  At the same time, it was disclosed that the reporter contacted Wu Chaochao, a staff member of the Media Department of Nongfu Spring, and sent an interview outline as required. After that, he repeatedly dialed his phone, but the other party did not answer and did not receive any response.

  Our reporter found that since April 16, Wu Chaochao, who is responsible for media communication, has not answered the reporters’ calls.

  Southern Daily reporters, Zhou Zhao and Zhao Binghui

  Reporter observation

  Don’t pretend to be an ostrich in case of trouble in Nongfu Spring

  Pretending to be an ostrich and burying your head in the sand can only deceive yourself. However, it is impossible for you not to look up, open your eyes, or face the objective world for the rest of your life. The problem has to be solved. When everyone pays attention to you, they all prick up their ears and wait to hear your explanation. You don’t want a good opportunity to clarify. When you wait for your spirit to practice your lines and plan to give a speech, I am afraid that there will be no interested audience.

  Nongfu Spring released five test data on total arsenic, cadmium, selenium, nitrate and bromate in bottled water produced by multiple factories on the 14th. However, from the response, Nongfu Spring only said in general that "third-party testing agencies provide testing data." As for who the "third party" is, Nongfu Spring has not made it public. According to media reports, Nongfu Spring has commissioned the Hangzhou Quality and Technical Supervision and Testing Institute to test its products, but the test data is significantly different from the data released by Nongfu Spring on the 14th. Such an important test, but not telling which agency tested it, will inevitably weaken the persuasiveness of its data. You sell drinking water, not train tickets, and you can’t say "believe it or not, I believe it" to consumers across the country and send people away.

  A responsible enterprise should strictly implement national, local, and relevant industry standards, even the most stringent one, and at the same time mark the product packaging as required. Since Nongfu Spring’s products are of high quality, leaving behind the national standard eight streets, why not mark the national standard on the product packaging generously? There is no need to choose a place with the lowest requirements and post the standard everywhere to attract people’s dislike.

  Enterprises can’t just talk about being responsible to consumers. In action, they must first take consumers seriously and answer every question of "God" seriously and sincerely.

  Zhou Zhao

(Source: Southern Daily)

A number of new cars debut! 2023 Qingdao International Auto Show opened on April 28th.

Original title: A number of new cars debut! 2023 Qingdao International Auto Show opened on April 28th.

Source: Qingdao News Network Automobile

Original title: A number of new cars debut! 2023 Qingdao International Auto Show opened on April 28th.

Source: Qingdao News Network Automobile

From April 28th to May 3rd, one of the five auto shows in China, the 22nd Qingdao International Auto Show in 2023 will be held in Qingdao International Convention and Exhibition Center (Laoshan District).

As the most influential automobile exhibition in the north in the first half of the year, more than 100 brands brought the latest and hottest models to Qingdao, six indoor exhibition halls, showing thousands of models covering new energy, passenger, commercial, business and luxury, and relaying the upcoming Shanghai International Auto Show, which was a wonderful connection and exploded May Day!

01

Seize the intelligent track and launch a new car in Qingdao.

The competition of intelligent track is becoming more and more fierce. Both traditional car companies and new car-making forces have made great efforts in the field of "electrification and intelligence".

As the largest and most influential international automobile event in Shandong, every Qingdao International Auto Show, all brands will launch their latest models in the north or Shandong.

Weilai EC7, Krypton X, brand-new BMW 7 Series, BMW iX1, Lectra 08, Buick E5, BYD Seagull, BYD pro 2023, Tucki P7i, Dongfeng Honda HR-V, FAW Pentium M9, brand-new smart #3, SAIC Volkswagen Xintuyue, Hongqi H6, Dongfeng Nissan brand-new Sylphy, Volvo brand-new C40, and GAC AION Y younger. Chang Anyida, Dongfeng Citroen Versailles Modified Edition, Changan Auchan Z6IDD … In this exhibition, new cars and technology are still the focus of the scene, and dozens of new car conferences will instantly detonate the atmosphere.

02

Car buying boom detonated May Day.

After the sales period of the "Guoliu A" model was extended, the "price reduction storm" in March slowed down, and the promotion policy in April was no longer crazy. Under the current situation that the inventory pressure is still great, consumers who are still on the sidelines are the "problem" and "antidote" of the terminal consumer market.

The first wave of small climax of Qingdao automobile consumption detonated by the West Coast International Auto Show in March, many brands also indicated that they are bound to launch a general attack on inventory pressure at the Spring Auto Show in May. With the approach of the exhibition, the audience’s call for consultation also focused on "preferential policies for XX models at the auto show".

In order to cooperate with the promotion activities of various brands at the Spring Auto Show, and to give back to the support and love of fans and friends, the organizing committee will also launch a "car lottery" on the spot, giving away gifts such as refrigerators, color TVs and high-end cars, such as window film!

As the opening of the exhibition approaches, brands can’t help but lock in the mood of prospective car buyers in advance and release preferential policies one after another.

Geely Auto Show offers a limited time discount of 45,000 yuan;

Lorenz offers multiple discounts. The auto show went straight down in a limited time, up to 50,000 yuan; Pre-stored 2023 yuan intentional gold deducted 20000 yuan car purchase; You can also enjoy the factory subsidy policy;

Changan Auchan’s highest cash dropped by 17,000 yuan;

FAW Pentium financial subsidy of 10,000 yuan, replacement subsidy of 10,000 yuan;

Dongfeng Honda: Take photos with HRV PHEV and HR-V new cars and get a copy of the original car model; Auto show specials, with a maximum discount of N million, which is said to be very pleasant surprise;

……

Dongfeng Citroen, which set off the storm of price reduction in March, brought the modified version of Versailles, Tianyi and C6 to this exhibition. What kind of preferential policies will the site come up with? Citroen said that it would sell you a pass first.

The tip of the iceberg began to emerge. It is conceivable that the scene of Qingdao International Auto Show will be so hot from April 28th to May 3rd.

03

Dream the future and walk with love.

With the theme of "Green, the Road to the Future", Qingdao International Auto Show has been practicing the social responsibility of one of the five auto shows in China, and it is highlighted in the details of the exhibition. The 22nd Qingdao International Auto Show in 2023 is a series of charity activities, and you are cordially invited to participate.

In this exhibition, the organizing Committee specially invited 100 "little reporters" to the scene to touch the latest automobile technology and inject "car dream" into their dreams.

Together, "Children" will protect the dream of reading books-the donation activity of love books jointly organized by the organizing committee of the conference, Qingdao Financial Daily and Qingdao Traffic Station will also be held on the spot. Dear friends and children, you can donate children’s books (suitable for children under the age of 12, with complete pages and more than 90% new) that are idle at home, and every five books can be exchanged for two tickets for the commemorative edition of this exhibition, and a thank-you letter from the organizing Committee will be given. Let your love accompany more peers to grow up happily. For every big friend and child who participates in this activity, this visit will gain a more valuable meaning.

In addition, many wonderful and interesting activities will be carried out on the spot, such as fun photography contest, painting the future, auto show painter, random dance, auto show of the second campus cultural festival of Guanhai News, etc.