Upon returning to China, he worked for several industrial enterprises, and was then recruited by Sun Yat-sen to develop finances for his Canton government.

[6] He founded the China Development Finance Corporation (CDFC) in 1934, along with other prominent financial figures, such as Chang Kia-ngau, Chen Guangpu and H.H.

Soong conceded to Stalin the Manchurian railways and Korean independence but refused to allow Soviet interference in Xinjiang or 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.

[9] Soong was known for his tough negotiating style with Stalin in getting straight to the point and freely using the threat of American military backing to strengthen his demands.

[12] During the war years, he financed the Flying Tigers, American mercenary group that was later incorporated into the United States Air Force.

[7]: 138  Rival Nationalist individuals and factions which criticized him included those associated with Sun Ke, Zhang Qun, CC Clique, and the Gexin movement.

[7]: 140  Nonetheless, Soong was active in the Nationalist government's financial policy until he moved to the United States in January 1949.