Complex sentence: He served as a political instructor ("zhengzhi weiyuan") of the Eighth Route Army in the northeastern China during the Sino-Japanese War, and became the first governor of Yanbian Korean Autonomous Prefecture from 1952 to 1965.
Split into simpler sentences: He served as a political instructor ("zhengzhi weiyuan") of the Eighth Route Army in the northeastern China during the Sino-Japanese War. Later, he became the first governor of Yanbian Korean Autonomous Prefecture and was in office from 1952 to 1965.