In February 1928, the forces of Yuan Wencai and Wang Zuo were officially incorporated into the regular communist army as the 1st Army, 1st Division, 2nd Regiment. Yuan was named as the regimental commander, and Wang as the deputy regimental commander, with He Changgong as the communist party representative (何长工). On February 17, they participated in a successful attack at Xincheng on a battalion of the Kuomintang's Jiangxi Army, killing the enemy commander and taking more than a hundred prisoners. Wang Zuo joined the Communist Party of China in April 1928. However, it must be said for Wang Zuo, it was more accurate to say he joined Mao Zedong's clique than the Communist Party of China, since his loyalty was mostly to Mao personally, instead of to the communist party, which eventually caused his downfall and final death when Mao lost the power struggle with Li Lisan and Xiang Zhongfa.