Based on the principle of voluntariness, I 18 to 55 years old, have the basic ability and time to engage in voluntary service, and have good physical and mental health. Two or more doses of COVID-19 vaccine have been vaccinated, and there is no stay or exposure history in the high-risk areas of COVID-19 in the past 14 days, and the confirmed cases have no contact history with close contacts or suspected cases. They hold the green code of Longjiang Health Code and the green code of Communication Big Data Travel Card. Strong organizational discipline, no bad records or behaviors that damage the image of volunteers, and obey the arrangement of volunteer service.