【推荐1】After a lot of local and state warnings, research and bans of hoverboards (平衡车), the federal government issued a statement on Wednesday. The message: Many of the machines are a major fire risk.

The Consumer Product Safety Commission (CPSC) announced the recall (召回) of more than a half-million hoverboards.The safety commission said that the battery-powered machines had been the cause of at least 60 fires. The announcement affects 10 companies that make or sell the products, including Razor and Swagway, two of the leading manufacturers.

Hoverboards, which do not actually hover or fly, have been the subject of regulatory examination in recent years. Officials have banned them from airplanes and sidewalks, and the safety commission carried out research last fall because of reports of fires and explosions.

The risk of fires from the machine's electrical system and battery(电池) pack has attracted the most attention from the safety commission, which says it will now turn its focus toward the risk of falls and other accidents. The agency is worried that flaws (缺陷) in the board's design could lead riders to lose their balance.

There is no federal safety standard specific to hoverboards. Underwriters Laboratories (UL), a standards-setting and testing organization, came up with voluntary electrical requirements for self-balancing hoverboards as a result of the safety commission's research, said Elliot F. Kaye, the chairman of the CPSC.

He required consumers to return any hoverboard that did not reach the standards set by the company. However, part of the problem, he explained, was that many hoverboards had been sold by temporary stands such as those in malls or college campuses — fly-by-night sellers that can be harder to track down or get in touch with. “That is a deeply frustrating aspect of it,” Mr. Kaye said. “Somebody can just put up a stand, order some products, disappear, and there's nobody there to take responsibility when things go wrong.”

【推荐2】Nobody ever imagined that after being lost for more than half a century, the intangible cultural heritage known as Gaolou Mixian would be restored and passed down by a young man. “As someone of Gaolou origin, I have a responsibility to restore our ancestors’ art form,” said Chen Guorui, the world’s only inheritor of this ancient art.

Gaolou Mixian uses rice paste(米糊)to glue together selected grains of transparent rice to create realistic figures or structures. It is a unique folk art that developed during the Qing Dynasty and reached its peak during the first half of the 20th century. Each household in Gaolou village would make rice structures that they put on display in their ancestral halls during the Chinese New Year, which attracted people from all sides.

However, due to the wet weather in southern China, these rice-made artworks would only last three to four months before losing their shape. It is for this reason that these works are not seen in museums in China. Due to various historical reasons, most people in Gaolou village did not pass down the art form, which caused it to disappear nearly 70 years ago.

Chen found out about this after hearing one former resident express disappointment about its loss. Curious, he started to do research and tried out the methods he heard about from older people in the village. After several months of exploration, Chen finally completed his first successful work.

Over the past five years, Chen has gradually improved his skills and even begun using new techniques, such as creating some colorful artworks with colored grains of rice. Since 2017, people at home and abroad have taken an interest in this long-lost art form. To avoid being the last inheritor(传承者), Chen has been giving classes to some students at a primary school in Fuzhou with the support of local education authorities.

【推荐3】Young people can have problems with their minds. Some student becomes worried because they have to study very hard. Others have trouble getting on well with people like their parents and classmates.

Liu Wei, a junior 2 student from Hefei, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife. Another student, 14-year-old Yang Fang from Guangzhou, was afraid of exams. She got very worried in one, and when she looked at the exam paper, she couldn’t think of anything to write.

A recent report from Jiefang Daily says about 18% of Shanghai teenagers have mental (心理的) problems. Their troubles include (包括) being worried and very unhappy, and having problems in learning and getting on well with people. Many students who gave problems won’t go for advice or help. Some think they will look stupid if they go to see a doctor. Others don’t want to talk about their secrets.

Liang Yuezhu, an expert on teenagers from Beijing Anding Hospital has the following advice for teenagers: