A staff member shows how to use a smart thermometer at a quarantine spot in Suihua City, northeast China's Heilongjiang Province, Jan. 29, 2021. The smart thermometer, which is pasted under the armpit of the tested, can monitor people's body temperature and report abnormal body temperature in real-time. Data collected by the smart thermometers are sent to the mobile phones of the epidemic prevention staff. (Photo by Zhang Tao/Xinhua)