Answer
Chiang Ching-kuo was sent to study in the Soviet Union by his father, Chiang Kai-shek, in 1925. This decision was influenced by the Soviet Union's support for the Kuomintang, the political party led by Chiang Kai-shek, and the desire to strengthen ties between the two countries. Chiang Ching-kuo spent several years in the Soviet Union, where he received military and political training and developed a deep understanding of communism.