July 8 to September 1. According to official website of Heilongjiang Education Bureau, the summer vacation time of primary and secondary schools in hailin city in 2023 will be from July 8th to September 1. Hailin city is an escrow county-level city in Mudanjiang City, Heilongjiang Province. It is located in the southeast of Heilongjiang Province and belongs to mountainous and hilly areas. It is 286 kilometers away from Harbin, the provincial capital, and only 12 kilometers away from Mudanjiang city.