According to the latest Beijing epidemic prevention and control requirements, all participants must provide "Beijing Healthbao" information before entering the hotel. And participate in the activity with a 48-hour nucleic acid test certificate. In addition, we will ask all people in medium and high risk areas to return and report the information as required by their superiors. All participants entering the hotel shall cooperate with the hotel for inspection and wear masks throughout the meeting. Meanwhile, the hotel will conduct regular disinfection of the conference venue according to the requirements of Beijing CDC.