Yichun is a city in Heilongjiang Province. Yichun is a prefecture-level city under the jurisdiction of Heilongjiang Province, an important eco-tourism city in the north of China and a central city in the northeast of Heilongjiang Province approved by the State Council. The city has jurisdiction over 4 municipal districts, 1 county-level city and 5 counties, with a total area of 32,759 square kilometers. According to the data of the seventh census, as of 0: 00 1 1 in June 2020, the permanent population of Yichun was 87888 1. Yichun has a long history and is a multi-ethnic frontier city. Before the Tang Dynasty, this was the place where ethnic minorities in northern Xinjiang lived and worked, and the Tang, Liao, Jin, Yuan, Ming and Qing dynasties all exercised jurisdiction here. Yichun is located in the northeast of China, in Heilongjiang Province, bordering Hegang and Jiamusi in the east, Harbin in the south and Sandu and Suihua in the west. Yichun belongs to the continental monsoon climate in the north temperate zone. The annual average temperature 1℃ is low. Frost-free period110-125 days, the frost-free period is short; There are four distinct seasons throughout the year. Four or five months in spring, six or seven hundred and eighty-three months in summer, ninety-two months in autumn and November to March in winter. Climate characteristics of the four seasons: short spring and autumn, changeable temperature, fast temperature rise and fall, windy days; Summer is hot and humid and rainy; Winter is cold and long,