China Sea, the name given to part of the North Pacific Ocean, off the east coast of Asia. It consists of the East and South China seas, which are joined by the Taiwan Strait.
The East China Sea, including the Yellow Sea, has an area of about 500,000 square miles (1,300,000 km2). It is bounded by China on the west; Korea on the northeast; the island of Kyushu and the Ryukyu Islands, all in Japan, on the east; and Taiwan on the south. The East China Sea is generally shallow; only near the Ryukyu Islands do depths exceed 600 feet (180 m).
The South China Sea is bounded by the Chinese mainland on the north, Taiwan on the northeast, the Philippines on the east, the island of Borneo on the south, and the mainland of Southeast Asia on the west. It has an area of nearly 900,000 square miles (2,300,000 km2) and a maximum depth of more than 17,000 feet (5,200m).