Passengers enter a subway station in Shenzhen, south China's Guangdong Province, March 18, 2020. Some of the city's subway stations, which were often overwhelmed with passengers during rush hours before the epidemic, have taken a variety of measures to avoid the congregation of passengers amid the coronavirus outbreak. (Xinhua/Liang Xu)
Passengers enter a subway station in Shenzhen, south China's Guangdong Province, March 18, 2020. Some of the city's subway stations, which were often overwhelmed with passengers during rush hours before the epidemic, have taken a variety of measures to avoid the congregation of passengers amid the coronavirus outbreak. (Xinhua/Liang Xu)
Passengers scan the QR code for name registration at a subway station in Shenzhen, south China's Guangdong Province, March 18, 2020. Some of the city's subway stations, which were often overwhelmed with passengers during rush hours before the epidemic, have taken a variety of measures to avoid the congregation of passengers amid the coronavirus outbreak. (Xinhua/Liang Xu)
Passengers enter a subway station in Shenzhen, south China's Guangdong Province, March 18, 2020. Some of the city's subway stations, which were often overwhelmed with passengers during rush hours before the epidemic, have taken a variety of measures to avoid the congregation of passengers amid the coronavirus outbreak. (Xinhua/Liang Xu)
Passengers enter a subway station in Shenzhen, south China's Guangdong Province, March 18, 2020. Some of the city's subway stations, which were often overwhelmed with passengers during rush hours before the epidemic, have taken a variety of measures to avoid the congregation of passengers amid the coronavirus outbreak. (Xinhua/Liang Xu)