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China, schools are in a step-by-step state, but we have a point to look at before coming to school. It was followed by Chinese students suddenly dying while running with masks in PE.

Correspondent Sung-Yeop Jung of Beijing.

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Parents gathered in front of a middle school in Hunan Province, China.

This is because a third-year student at the school on the 30th of last month passed out and died while playing a 1,000-meter running measurement during physical education.The student was wearing an N95 protective mask.

More than six days ago, a third-year student who ran with an N95 mask at a middle school in Henan Province died, and including the case of Zhejiang, which occurred on the 14th of last month, there were three students who died while wearing a mask at school.The police are investigating the accident, and there is a conflict between the claim that wearing a mask cannot cause direct death and that it can cause serious oxygen starvation.

[Wuqing Long / Zhengzhou People's Hospital Doctor: Wearing a mask in a bad condition can cause danger due to lack of oxygen.] Isn't the

school compulsory to comply with the quarantine standards for students who are physically deprived by long self-isolation? Anger also poured out.

Authorities say that it is not necessary to wear a mask in a well-ventilated field, but there are also voices that it is difficult to keep the distance between students during physical education, so it is difficult to remove the mask.

Following an accident, several regions in China canceled physical education classes at high school entrance exams, and in some cities, the government has made explicit rules that you don't need to wear a mask if you keep a safe distance during physical education.

(Video coverage: Choi Duk-hyun, Video editing: Jang Hyun-gi)