Sun regained control of Kwangtung in early 1923, again with the help of mercenaries from Yunnan and from the Comintern. Undertaking a reform of the KMT, he established a revolutionary government aimed at unifying China under the KMT. That same year, Sun sent Chiang to spend three months in Moscow studying the Soviet political and military system. During his trip in Russia, Chiang met Leon Trotsky and other Soviet leaders, but quickly came to the conclusion that the Russian model of government was not suitable for China.
Chiang
Leon Trotsky