The launch took place at 19:23 local time [11:23 GMT].
The rocket will deliver Shijan-18 telecommunication satellite into space. The satellite might operate there up to 15 years in case of a successful launch, Sputnik reported.
The first launch of the Changzheng 5 (Long March 5) carrier rocket took place in November 2016.
China's largest ever rocket has a maximum payload capacity of 55,116 pounds to a low-Earth orbit.