The part of the Pacific Ocean off the coast of China, divided by the island of Taiwan into the East China Sea in the north and the South China Sea in the south.
中国海（太平洋的一部分，台湾岛以北为东中国海，以南为南中国海）
Definition of China Sea in US English:
China Sea
proper nounˈCHīnə ˈˌsē
The part of the Pacific Ocean off the coast of China, divided by the island of Taiwan into the East China Sea in the north and the South China Sea in the south.