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.
Yanzhou District Yanzhou (postal: Yenchow; ) is a district and former county-level city under the administration of Jining, in the southwest of Shandong province, People's Republic of China.