Starting on September 1, the Chinese navy’s North Sea fleet held a live-fire military exercise for four consecutive days in the Yellow Sea region, to the southeast of Qingdao City, Shandong Province. According to the Chinese military, it was an annual program of regular exercise training with a focus on naval gun fire. From September 5 onward, for a period of five days, the United States and South Korea conducted anti-submarine exercises in the Yellow Sea. The United States did not send its aircraft carriers or nuclear submarines, but only sent two Aegis destroyers. South Korea mobilized 209 submarines (1,200 tons), patrol boats, and destroyers in the joint exercise.
Source: Asia Times, September 1, 2010