Soong was in charge of negotiating with the Soviet leader Joseph Stalin regarding Soviet interests in China , and traveled to Moscow to extract from Stalin a guarantee to oppose the Chinese Communist Party . Soong conceded to Stalin the Manchurian railways and Korean independence , but refused to allow Russian interference in Xinjiang or Russian military bases in Manchuria ; he also indicated that China and the Soviet Union could share dominion over Mongolia if a " mutual assistance pact " was agreed to . Soong was known for his tough negotiating style with Stalin , getting straight to the point and freely using the threat of American military backing to strengthen his demands . When the Sino-Soviet treaty was signed , China ceded to Russia parts of Mongolia , use of a naval base at Port Arthur ( with civilian rule remaining Chinese ) , and co-ownership of the Chinese Eastern Railway in Manchuria . In return , Soong extracted from Stalin recognition of the Republic of China as the legitimate regime of China , aid from the Soviets , and oral agreement to an eventual Soviet withdrawal from Manchuria . The treaty failed to end tension in China with the communists , resulting in renewed fighting in the Chinese Civil War . Stalin had previously told the Americans that President Roosevelt should inform Chiang Kai-shek of the Russian demands in Manchuria , at the Yalta Conference , before Stalin informed Soong
Yalta Conference
Yalta Conference
T. V. Soong