Are both  Panzhou and Tianchang in China?
Tianchang Tianchang is a Sub-prefecture-level city on the Yangtze River, 290 km northwest of Shanghai, it's a part of Yangtze River Delta Economic Zone. It is under the administration of Chuzhou, Anhui Province, China.
Tunchang County Tunchang County is one of four counties of Hainan Province, People's Republic of China. Its postal code is 571600, and in 1999 its population was 250,059 people. The administrative seat lies at Tuncheng.