Organised by the PLA Chengdu Military Area Command, "Joint Action-2015D," began yesterday in a plateau area in the southwestern province of Sichuan and is the first of the five, state-run Xinhua news agency quoted a defence statement as saying.
"Joint Action-2015D" is one of the five similar drills involving more than 140,000 troops from over 140 People's Liberation Army (PLA) regiments of various types, the statement said.
The drill involved personnel from the army, navy, air force and artillery, to test the troops' joint operations using digitised commands and information, it said.
Exercises included long-distance delivery, joint intelligence reconnaissance and joint computer-coordinated bombardments, are among the focuses of the exercises, the statement said.
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The exercises are expected to improve the troops' capability of reacting in dangerous and changing circumstances, it said.
The exercises are followed by PLA's biggest live fire drills in the disputed South China Sea (SCS) recently in which over 100 naval ships and besides thousands of troops took part.
The 2.3-million-member PLA, the world's biggest standing army, has stepped up its drills which included live firing exercises involving mock rival forces to test the ability of the troops since Chinese President Xi Jinping took over power in 2013.
While cracking down hard against corruption in the military, Xi is also pressing PLA to test its preparedness to win wars.
A military court yesterday sentenced Gu Junshan, former deputy head of the General Logistics Department of the PLA to death with a two-year reprieve for corruption.