The exercises came days after North Korea's sixth, and most powerful, nuclear test fuelled global concern that the isolated nation plans more weapons tests, possibly of a long-range missile.
An anti-aircraft defence battalion held the exercises early on Tuesday, near the Bohai Sea, the innermost gulf of the Yellow Sea that separates China from the Korean peninsula, an official military website said.
Troops travelled to the site from central China before immediately beginning drills to fend off the "surprise attack" simulating real battle, it said.
"The troops' rapid response capabilities and actual combat levels have effectively been tested."It was the first time certain weapons, which the website did not identify, had been used to shoot down low-altitude targets coming over the sea, the military website said, without elaborating.
The drills "do not target any particular goal or country", and were part of an annual plan intended to boost the troops' capability, China's Defence Ministry said on its website late on Wednesday, in a response to media.
China is deeply suspicious of any US-backed military build-up in the region, and has repeatedly expressed anger at the deployment of a US anti-missile defence system in South Korea.
(Reporting by Christian Shepherd; Editing by Clarence Fernandez)
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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