San Diego (/ˌsæn diˈeɪɡoʊ/ SAN dee-AY-goh, Spanish: [san ˈdjeɣo]; Spanish for 'Saint Didacus') is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles.
Qinggang County belongs to Suihua City, Heilongjiang Province, located in the central and southern part of Heilongjiang Province, the hinterland of Songnen Plain. It is 120 kilometers away from the provincial capital Harbin in the south, 90 kilometers from the oil city Daqing in the west, across the Tongken River from Hailun City and Wangkui County in the east, 88 kilometers away from Suihua City and Heihe City in the north. Qinggang County covers an area of 2685 square kilometers, with a total of 2.56 million mu of cultivated land, 616500 mu of grassland and 620000 mu of woodland. Qinggang County belongs to the mid-temperate continental monsoon climate. Dry and windy in spring, warm and rainy in summer, cool and dry in autumn, cold and little snow in winter, four distinct seasons, frost-free period of about 130 days throughout the year. In 2018, the GDP of Qinggang County reached 7.45 billion yuan, an increase of 5% over the same period last year.