Hebei is located in the northern part of the North China Plain extending into the Inner Mongolian Plateau. Beijing, the capital of China, and Tianjin, the important trading port in north China, are situated at the center of the province, although are not part of it. It adjoins Liaoning and Inner Mongolia in the north, Shanxi in the west and Henan and Shandong in the south. The Bohai Sea lies to the east of Hebei. Its coastline extends 487 km, and the total area of the province is 190,000 sq km.