Suizhong County is a county of southwestern Liaoning, People's Republic of China. It is located on the northern coast of the Bohai Sea and is the southernmost county of Huludao City, bordering Hebei to the southwest. The county has an area of 2,765 square kilometres (1,068 sq mi), a population of 550,000, and is an economically important region within Huludao. Suizhong is home to the first Chinese citizen to travel in space, Yang Liwei, and Wu Sangui, a warlord.