The drill was conducted by the Western Theater Command of the People's Liberation Army (PLA). The location and timing of the exercise were not disclosed.
According to the China Central Television, 10 PLA units, including aviation and armoured forces, participated in the drills.
Tibet, Xinjiang, Ningxia, Qinghai, Sichuan and Chongqing comes under the newly formed Western Theater Command.
In July, the PLA had conducted a live drill in Tibet, which borders India.
China has said its army is ready for a military conflict with India, whose troops are on its territory in Doklam.
Indian and Chinese troops have been engaged in a three-month stand-off at Doklam in the Sikkim section of the India-China border.
In June, Indian troops had halted road construction at Doklam, citing the disputed status of the territory. This triggered the longest military stand-off between India and China after 1987 when both sides faced-off in Somordong Chu valley in Arunachal Pradesh.
India and Bhutan say the area belongs to Thimpu, but China calls Doklam as its own.
Beijing wants New Delhi to withdraw troops from Doklam. New Delhi is for a simultaneous pullback of both Indian and Chinese troops.