The Taiyuan Satellite Launch Center (TSLC) also known as Base 25 (Chinese: 二十五基地), is a People's Republic of China space and defense launch facility (spaceport). It is situated in Kelan County, Xinzhou, Shanxi Province and is the second of four launch sites having been founded in March 1966 and coming into full operation in 1968.

Shanxi is an inland province of China and is part of the North China region. The capital and largest city of the province is Taiyuan, while its next most populated prefecture-level cities are Changzhi and Datong. Its one-character abbreviation is "晋", after the state of Jin that existed there during the Spring and Autumn period.