Chinese Merchants in South Seas play a significant role in Shanghais intemationaltrade development,they innovated varied trade models in Shanghais business markets open to South Seas.With their effort,South Seas has become the most important export market for the light industry of Shanghai since the 1920s,which stimulated immediate advances in Chinese national industries and in other related fields such as insurance and marine transportation,etc.In addition,their financial investment and sponsorship of local schools allowed overseas Chinese merchants to have a deep involvement in Shanghais economy.With the power of trade unions,they promoted the modization of Shanghais intational trade mechanism and boosted the trade contacts between Shanghai and South Seas.