With support from their mentor Pavel Mif, president of Sun Yat-sen University and envoy of Comintern at that time, they returned to China after graduating. This provoked a struggle with Li Lisan and his allies, who controlled the Chinese Communist Party (CCP). Dissidents against Li inside the Party also objected to their return, but, in the 4th Plenary Meeting of the Communist Party's 6th National Congress, and with the presence and direct support of Pavel Mif, Wang Ming and his group won a landslide victory. Wang was elected to the Communist Party's politburo, while Bo Gu and Zhang Wentian took up other, equally important, positions.