Lanzhou, referred to as "Lan" or "Gao", was called Jincheng in ancient times. It is an important industrial base and comprehensive transportation hub in northwest China approved by the State Council, the capital of Gansu Province, one of the important central cities in the western region, and an important node city in the Silk Road Economic Belt.
Lanzhou is located in the northwest of China, in the middle of Gansu, the geometric center of Chinese mainland. It is a comprehensive transportation hub of railways, highways and aviation in the northwest of China, the headquarters of the army organs in the western theater of the Chinese People's Liberation Army, one of the five central cities in the China section of the New Eurasian Continental Bridge, an important regional business center and modern logistics base in the west.
Extended data
Lanzhou has a temperate continental climate. The annual average temperature is 65438 00.3℃. There is no heat in summer and no cold in winter. This is a famous summer resort. The annual average sunshine hours are 2446 hours, the frost-free period is 180 days, and the annual average precipitation is 327mm, mainly from June to September.
Lanzhou is rich in inbound water resources. The inflow of the Yellow River and its tributaries, Huangshui River and Datong River, runs through the city, reaching 33.7 billion cubic meters, with stable water volume, no ice in all seasons and small sediment concentration. The Lanzhou section of the Yellow River has a total length of 152km, of which 45km flows through the urban area.
Lanzhou's water resources are lower than the national average, and the Yellow River and its tributary Huangshui can meet the urban industrial and agricultural water and domestic water. Lanzhou has 960 million cubic meters of groundwater every year. The total surface water resources of river runoff is 38.4 billion cubic meters, and the total groundwater is 960 million cubic meters.
Baidu encyclopedia-Lanzhou