North China Plain: Bordering on the Taihang Mountains in the west, the coast in the east, Yanshan Mountain in the north and Huaihe River in the south, it covers 310,000 square km, with an ...

With an average elevation of lower than 50 meters and part of it lying below 5 meters above sea level, it is generally lower than the North China Plain. Crisscrossed by many rivers and dotted with ...