Qinhuangdao is a port city and prefecture-level city in northeastern Hebei province, People's Republic of China. It is about 300 km (190 mi) east of Beijing, on the Bohai Sea, the innermost gulf of the Yellow Sea. In the 19th century, Qinhuangdao included the separate towns of Qinhuangdao and Tanghe. Both were stations along the Peking-Mukden Railway. The design and construction of the new harbour and port of Ching Wang Tao in the Gulf of Pechili was undertaken by the partnership of Sir John Wolfe-Barry and Lt Col Arthur John Barry at the turn of the 20th century.