ChinaSat (Chinese: 中星; pinyin: Zhōngxīng) is the brand name of communications satellites operated by China Satellite Communications.

In 2007, a joint venture China Direct Broadcast Satellite was formed to run the brand ChinaSat. It was a joint venture of state-owned companies China Satellite Communications, China Orient Telecommunications Satellite and Sino Satellite Communications. The latter was controlled by China Aerospace Science and Technology Corporation (CASC). However, China Satellite Communications was changed from a direct subsidiary of the State-owned Assets Supervision and Administration Commission of the State Council (SASAC) to a direct subsidiary of CASC in 2009, the joint venture was dissolved and Sino Satellite Communications became a subsidiary of China Satellite Communications.

The brand ChinaSat was previously operated by China Telecommunications Broadcast Satellite Corporation, which was owned by China's Ministry of Posts and Telecommunications. China Telecommunications Broadcast Satellite Corporation was merged with other state-owned companies to form China Satellite Communications Corporation circa 2000.

Satellites formerly operated by Sino Satellite Communications and China Orient Telecommunications Satellite were renamed with ChinaSat designations following the acquisition of China Satellite Communications by CASC. ChinaStar 1 became ChinaSat 5A, SinoSat 1 became ChinaSat 5B, and SinoSat 3 became ChinaSat 5C.

The Zhongxing-1x (or ChinaSat-1x) series includes four spacecraft as of September 2022. Despite the ChinaSat designation the satellites are reportedly to be Fenghuo-2 military communications satellites manufactured by CAST and based on the DFH-4 satellite bus. They follow the first generation of Fenghuo satellites, namely ChinaSat 22 and ChinaSat 22A. The first three satellites have been launched from the Xichang Satellite Launch Center using Long March-3B/G2 rockets while the fourth one has been launched from the Wenchang Space Launch Site using a Long March 7A rocket, and in particular:

The shift to a different launcher for the fourth satellite capable of carrying a greater mass to the intended geosynchronous orbit could indicate the use of a bigger and heavier satellite bus, possibly an upgraded version of the previously used DFH-4 bus.

ChinaSat 2A was launched in 2012.

Zhongxing-2D (or ChinaSat-2D) was launched at 17:05 UTC on 10 January 2019 from the Xichang Satellite Launch Center using a Long March-3B/G3 from the LA-2 launch complex.