Hancheng is a city in Shaanxi Province, People's Republic of China, about 125 miles northeast of Xi'an, at the point where the south-flowing Yellow River enters the Guanzhong Plain. It is a renowned historic city, containing numerous historic mansions and streets as well as over 140 protected historical sites that range from the Tang to the Qing dynasties. As of 2005, it has a population of around…