Search the dictionary A Chinese word or character, or English Draw a character Search 4 entries. tōngshāng 通商 to have trade relations tóngshàng 同上 as above tōngshāngkǒuàn 通商口岸 treaty port, forced on Qing China by the 19th century Great Powers wǔkǒutōngshāng 五口通商 the five treaty ports forced on Qing China by the 1842 treaty of Nanjing 南京條約|南京条约 that concluded the First Opium War, namely: Guangzhou 廣州|广州, Fuzhou 福州, Ningbo 寧波|宁波, Xiamen or Amoy 廈門|厦门 and Shanghai 上海