The Suihua epidemic in Heilongjiang Province was caused by attending more than one wedding banquet. According to the survey, in Huiqi Village, Huiqi Town, Wangkui County, Suihua City, Heilongjiang Province, many confirmed cases and asymptomatic infected people attended the wedding banquet more than once before and after New Year's Day. Huiqi Village, Huiqi Town, Wangkui County, Suihua is the earliest epidemic place in Heilongjiang Province. The early confirmed cases and asymptomatic infected persons in Wangkui County of Suihua are from Li Jinghua Tun and Hongjiatun in Huiqi Village. According to the trajectory of patients' activities released by Xinhua Viewpoint reporter, many villagers in Li Jinghua participated in wedding banquets and other party activities more than once before and after New Year's Day. After the outbreak in Wangkui County, Suihua City carried out a comprehensive special investigation of banquets. It is understood that since 65,438 on February 25th, 2020, Wangkui County has held more than 9,600 banquets with more than 80,000 participants, and Suihua City has held more than 3 100 wedding banquets. The traffic dispatcher has found a lot of information related to this epidemic. The data shows that the epidemic caused by such a huge dinner can be seen, so during the epidemic, we should reduce such activities, go out less, pay attention to protecting our health and reduce contact.