Heilongjiang Province, referred to as "Black", is a provincial administrative region of the People's Republic of China, the capital city of Harbin, located in northeastern China, the center of Northeast Asia, north and east of Russia across the Yangtze River, the west and Inner Mongolia Autonomous Region adjacent to Jilin Province in the south, bordering between the longitude of 121 ° 11 ′ - 135 ° 05 ′ between 43 ° 26 ′ - 53 ° 33 ′ north latitude, a total area of 473,000 square kilometers, ranking sixth in the country, the border is 2981.26 km long. 135°05′ east longitude and 43°26′-53°33′ north latitude, with a total area of 473,000 square kilometers, ranking 6th in the country, and a border line of 2,981.26 kilometers. As of June 2023, Heilongjiang Province has 12 prefectural-level cities and 1 region under its jurisdiction. As of the end of 2022, the total resident population of Heilongjiang Province was 30.99 million. The topography of Heilongjiang is characterized by "five mountains, one water, one grass and three fields". The terrain is roughly high in the northwest, north and southeast, and low in the northeast and southwest, consisting of mountains, terraces, plains and water; it spans the four major water systems of the Heilongjiang River, the Ussuri River, the Songhua River and the Suifen River, and has a temperate monsoon climate. Heilongjiang Province is located in the hinterland of Northeast Asia, is the Asia and the Pacific region land access to Russia and the European continent, the important window of China's border opening. The historical representative culture of Heilongjiang is the "Northeast Culture". It is the northernmost and easternmost provincial administrative region in China, and is an important national commercial grain production base, heavy equipment production and manufacturing base, important energy and raw material base, northern ecological security barrier, and a new high ground for opening up to the north. In 2023, Heilongjiang Province realized a gross regional product of 1588.39 billion yuan, of which the added value of the primary industry was 351.83 billion yuan, the added value of the secondary industry was 429.13 billion yuan, and the added value of the tertiary industry was 807.43 billion yuan.