wǔkǒutōngshāng

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]]