Air environment automatic sterilizer robot Xiao Chuang, intelligent temperature measuring robot Da Bai and ground cleaning and disinfecting robot Xiao De have been in service for COVID-19 prevention and control during the annual Spring Festival travel rush in Hefei. (Xinhua/Zhou Mu)

Da Bai (R), an intelligent temperature measuring robot, measures a passenger’s body temperature at the entrance of Hefei South Railway Station in Hefei, east China’s Anhui Province has been in service for COVID-19 prevention and control during the annual Spring Festival travel rush in Hefei. (Xinhua/Liu Junxi)

Ground cleaning and disinfecting robot Xiao De is seen at Hefei South Railway Station in Hefei, east China’s Anhui Province. (Xinhua/Liu Junxi)

Air environment automatic sterilizer robot Xiao Chuang, intelligent temperature measuring robot Da Bai and ground cleaning and disinfecting robot Xiao De have been in service for COVID-19 prevention and control during the annual Spring Festival travel rush in Hefei. (Xinhua/Liu Junxi)

Air environment automatic sterilizer robot Xiao Chuang, intelligent temperature measuring robot Da Bai and ground cleaning and disinfecting robot Xiao De have been in service for COVID-19 prevention and control during the annual Spring Festival travel rush in Hefei. (Xinhua/Zhou Mu)