中国左翼作家联盟
At the same time, Mao Dun participated in Chiang Kai-shek's Northern Expedition (1926–28), the main purpose was to unite the country. He quit, however, when Chiang's Kuomintang broke with the Communists in 1927. In July 1928, he went to Japan in order to take refuge. As he returned to China in 1930, he joined the League of Left-Wing Writers. Later, China went to war with Japan and he actively engaged in resisting the Japanese attack in 1937. In 1949, the communist government took over and he was responsible for working as Mao Zedong's secretary and Culture Minister until 1964.