The area of Lanzhou urban area was 13085 square kilometers in 2013. Lanzhou is the capital city of Gansu Province. It is a well-developed city in the northwest inland area and an important city in the Silk Road Economic Belt.
Lanzhou is the capital city of Gansu Province, an important industrial base and traffic operation center in Northwest China, and also the main passing city of the Silk Road Economic Belt.
Lanzhou is located in the northwest inland area, with complex and diverse terrain, complete types of terrain and disorderly distribution. It is also located in the upper reaches of the Yellow River. The Yellow River crosses the whole Lanzhou City, and the annual precipitation is rare.
Because Lanzhou is a basin City, it also contains a large population. The population counted in 2015 was 4015500, and the number is increasing every year.