A group of Chinese warships led by its sole aircraft carrier is testing weapons and equipment in exercises this week in the South China Sea that are going to plan, China's foreign ministry said Wednesday.

Exercises by the ships, in particular the aircraft carrier Liaoning, since last month have unnerved China's neighbors, especially at a time of heightened strain with self-ruled Taiwan, which Beijing claims as its own, and given long-running territorial disputes in the South China Sea.

China says the Soviet-built Liaoning and the other ships conduct routine exercises that comply with international law.