通商

(of nations)have trade relations
订立～条约conclude a trade treaty;sign a treaty of commerce/《关于中国西藏地方和印度之间的～和交通协定》(其中第一次提出和平共处五项原则，1954年4月29日)Agreement between the People’s Republic of China and the Republic of India on Trade and Intercourse between the Tibet Region of China and India/～航行commercial shipping/～航海条约treaty of commerce and navigation /～口岸trading port;open port