In order to thoroughly implement the decision-making arrangements made by the CPC Central Committee and the State Council on further optimizing the prevention and control measures of the epidemic situation in COVID-19 and doing a scientific and accurate job in prevention and control, according to the relevant requirements of the Comprehensive Group of Joint Prevention and Control Mechanism in the State Council, the "Communication Trip Card" service was officially launched from 0: 00 on December 13th. Query channels such as "communication itinerary card" SMS, webpage, WeChat applet, Alipay applet and APP will be offline simultaneously.