Lanzhou City, referred to as "Lan" or "Gaogao", the ancient name of Jincheng, is a prefecture-level city under the jurisdiction of Gansu Province, the capital of Gansu Province, Ⅰ big city, the State Council approved the determination of the important industrial base and comprehensive transportation hub in Northwest China, one of the important center of the western region, the important node of the Silk Road Economic Belt. Silk Road Economic Belt, an important node city. The city has five districts and three counties under its jurisdiction, with a total area of 13,100 square kilometers. As of the end of 2022, Lanzhou City has a resident population of 4,415,300 people. Lanzhou is located in northwest China, the geometric center of the land map of the Chinese mainland, with high terrain in the west and south, low in the northeast, and the Yellow River flowing from the southwest to the northeast, with canyons and basins interspersed. Lanzhou has a temperate continental climate. Lanzhou has a history of more than 2,000 years since the Qin Dynasty, since ancient times, it is a transportation hub and military fortress "contacting the four regions and carrying 10,000 miles", and it is known as "Pearl of the Yellow River", named after the meaning of "Golden City and Soup Pond". "Lanzhou has benefited from the Silk Road. Lanzhou benefited from the Silk Road and became an important transportation hub and commercial town. Later, it became one of the earliest cities in China to accept modern industrial civilization, and after the founding of New China, it was identified by the state as one of the key industrial bases to be constructed, and became an important national base for petrochemicals, biopharmaceuticals and equipment manufacturing. In 2012, the State Council approved Lanzhou New Area, the first state-level new area in Northwest China, and explicitly took the construction of Lanzhou New Area as an important initiative for the in-depth implementation of the strategy of western development, and developed Lanzhou into a modern metropolis in Northwest China in 2020.In 2017, the Development Plan of Lanzhou-Xining City Cluster explicitly put Lanzhou-Xining City Cluster into a new city to support the development of the city. Xining City Cluster to cultivate and develop into an important city cluster that supports the pattern of homeland security and ecological security, and maintains the prosperity and stability of the northwest region. In 2023, Lanzhou's gross regional product will be 348.73 billion yuan, an increase of 4.4% over the previous year. Among them, the added value of primary industry is 7.31 billion yuan, up 5.0%; the added value of secondary industry is 112.06 billion yuan, up 0.4%; the added value of tertiary industry is 229.36 billion yuan, up 6.2%.