Proper noun
A district of Beijing, China.
A district of Nantong, Jiangsu, China.
Source: en.wiktionary.orgCargoes were unloaded at Tongzhou and transported to Beijing by land. Source: Internet
In the Ming and Qing dynasties, however, the water level in the Tonghui River dropped and it was impossible for ships to travel from Tongzhou to Beijing. Source: Internet