This is a jiaozi. The stuffing is usually wrapped in dough and cooked in water. Jiaozi is an ancient Han traditional pasta, which has a history of more than 1,800 years and is deeply loved by the Chinese people.
Different platforms depict different colors of jiaozi, some are white and some are yellow. In addition, the patterns or folds on the edge of the jiaozi also vary from platform to platform. This emoji can represent jiaozi, reunion and Spring Festival.