Playing with apps on smart phones is very common among young people. Let's try some special apps and enjoy them.

    Nearly 7,000 medical workers in the team supporting Central China's Hubei province left the capital, Wuhan, the hardest-hit city in the novel coronavirus outbreak in China, and went back to their hometowns on Tuesday, March 31, marking the largest scale departure (离开) of medics (医学工作者)since the first group left on March 17. The Civil Aviation Administration of China has organized 51 planes to support the departure.

    More than 42,000 medics from other parts of the country have joined the battle with local medics to fight against COVID-19. The support teams came from 21 provinces, cities and autonomous regions(自治区) and some of them worked on several battlefields during the past months. The support team from the First Hospital of China Medical University in Shenyang, was among those in the group. Sixty members were in charge of treating COVID-19 patients in 100 beds in the Union Hospital and treated 174 patients who have been seriously ill since they arrived on Feb 10.

    Wang Zhenning, the leader of its support team, expressed his thanks to the Wuhan people who offered great help to them. "I am proud towitness and play a role in history. We've been here, seen it happen and become better. Wuhan is our second hometown. We will forever care about the city and the people fighting with us." he said.

    Wuhan city government showed great thanks to all medics in a letter, expressing their gratefulness of the medics' efforts to save lives in the battle. "Thanks to your arrival, Wuhan welcomes today's peace and stability. We will always remember your kindness!" the letter said. In it, the city government also invited the medics to visit Wuhan in the future for sightseeing. Local people volunteered to line up and see medics off as the medics left for home after finishing their mission(使命) in Wuhan. Wuhan traffic police led the way for medics to the airport.

   The grandmilitary parade (盛大阅兵式) and celebrationswere held in Tian'anmen Square, Beijing on Oct. 1 for the 70th anniversary of thefounding of the People's Republic of China.

   A grandmilitary parade was held in the morning, showing the great progress made by theChinese armed forces in recent years. About 15,000 officers and soldiers took partin the 80-minute parade in front of Tian'anmen Square. Then, a mass pageant(群众游行展) showing China's historical achievements andthe nation's great rejuvenation(伟大复兴)was held. It was seenas a lesson on Chinese history and how far the nation has progressed. The mass pageantlasted 65 minutes and was divided into five parts, each part showed respect to Chineseleaders in the past and leaders now, from Mao Zedong to Xi Jinping. In the evening,a gala(盛会)took place in Tian'anmen Square. The songs, dancesand fireworks celebrated the nation and its people.

    President Xi expressed warm National Day congratulations toChinese people home and abroad. Standing on the Tian'anmen Rostrum in Beijing, whereChairman Mao Zedong announced the founding of the PRC on Oct 1, 1949, Xi recalledChinese history. He also showed a road map for the country to realize the Chinesedream of national rejuvenation. He called for efforts to make a better life andto keep making achievements. The parade and celebrations have set off Chinese people'spatriotism (爱国心)and a strongsense of pride.

Recently, a tourist said in a video that there was no hot water on the Huangshan Mountain. Some tourists also complained(抱怨) online that they failed to get hot water for cooking instant noodles since it was banned(禁止) by the scenic area. For a time, "Why doesn't the Huangshan Scenic Area provide hot water for instant noodles?" became a hot topic on the Internet. Many people thought this rule was unreasonable.

Later, the staff of the Huangshan Scenic Area(景区) replied to the question: In order to protect the animals, plants and environment of the Huangshan Mountain, tourists are advised not to eat instant noodles in the area.

Before the rule was made, leftovers(残羹) and packaging materials from instant noodles were often found throwing in the scenic area. These seriously harm the soil and plants. In addition, animals, such as squirrels and birds, may eat these leftovers by mistake, which poses a threat(威胁) to their health.

In fact, eating instant noodles is not banned on the mountain but it is not encouraged, according to a leader of the scenic area. Actually, the ban on sales of instant noodles on the mountain was put in place in 2006.

The staff at the scenic area said, "Tourists can get hot water at the rest area in the scenic area. They are also allowed to bring their own food products such as bread and self-heating meals. For those who do not bring food, the scenic area has supermarkets and restaurants."

This action quickly received understanding and support from the public. "This is necessary. We should follow the rule while enjoying the beauty of nature," one tourist shared his opinion online. "I support the rule, and we should all play a part in protecting the environment."

For two centuries, the famous University of Cambridge debating society has hosted many prominent figures from world leaders to scientists to comedians.

On Nov 21, the Cambridge Union hosted another extraordinary guest—a non-human debater called Project Debater. Designed by IBM, Project Debater is a machine that uses Artificial Intelligence (AI) to form a spoken argument. It can even listen and answer to opposite statements, much like a real person.

In the Cambridge test debate, it argued the topic: AI will ultimately（最终）do more harm than good. Before the debate, more than 1,100 arguments for the positives and negatives of AI were submitted（递交）to the IBM website. The machine then analyzed these sources and formed the basis of its arguments in minutes. Project Debater then showed off its AI by arguing for both sides of the debate.

Over a four-minute speech, it argued first that, "AI can only make decisions that it has been programmed to solve while humans can be programmed for all situations."

In support of AI, it then argued that AI would create new jobs and "bring a lot more efficiency" to the workplace.

This isn't the first test for Project Debater. In June 2018, the machine went back-and-forth for 20 minutes against champion debater Harish Natarajan. 

According to New Scientist, on both occasions, Project Debater repeated points and didn't always sufficiently support them.

Speaking to Cambridge Independent, Noam Slonim, the project's lead engineer, said, "The AI is not perfect, but it's going in the right direction." The team hopes to improve the AI by researching why humans find certain arguments more persuasive than others. They also hope the test might provide well-informed viewpoints for society, governments and private companies. 

Since 2017, Jiading, Shanghai has built community libraries under the" Home Study" program. Its purpose is to encourage its local people to read more. Community libraries get help from local people and companies. The local companies provide space for free. Community volunteers also often provide help for the local libraries. If you enter the community library in Nanxiang Old Town, you will find it has a strong Chinese style. Among all community libraries in Jiading, the one in Nanxiang Old Town is the most special. It is next to the famous Tanyuan Garden, which was the private garden of Li Liufang, a scholar(学者) in the Ming Dynasty. The library is on the first floor of a building in the ancient Chinese style. There are 4,100 Chinese picture books in it. Zhang Bo works with volunteers to provide more books for their readers of all age groups. Some time ago, Zhang noticed that a girl often came to the library after school by herself. The girl did her homework at the library, but she never talked to anyone. Zhang learned that she had trouble communicating with others, so Zhang and other volunteers made friends with her. They became her" family away from home"." That is true community spirit," Zhang said.