The CCP was still small at the time, having a membership of just 300 in 1921 and only 1,500 by 1925. By contrast, the Kuomintang in 1922 already had 150,000 members. Soviet advisers also helped the Kuomintang set up a political institute to train propagandists in mass mobilization techniques, and in 1923 sent Chiang Kai-shek, one of Sun's lieutenants from Tongmenghui days, for several months' military and political study in Moscow. After Chiang's return in late 1923, he participated in the establishment of the Whampoa Military Academy outside Guangzhou, which was the seat of government under the Kuomintang-CCP alliance. In 1924 Chiang became head of the academy and began the rise to prominence that would make him Sun's successor as head of the Kuomintang and the unifier of all China under the right-wing Nationalist Government.