Tianlian 1 is a Chinese data tracking and relay communications satellite series. Tianlian 1-04 is the fourth satellite in the constellation. It provides communication coverage for the crewed Shenzhou missions, from Shenzhou 7 onwards. Functionally, it is similar to the United States Tracking and Data Relay Satellite System (TDRS).

Mission type: Communications · Orbit: Geostationary Transfer Orbit

Rocket: Long March 3C · Provider: China Aerospace Science and Technology Corporation