中国左翼作家联盟
He joined the Communist Party in July 1932 and became involved in revolutionary activities in Wendeng County, where he was attending school. He changed his name to "Gu Mu" to avoid implicating his family. In 1934, Gu went to Beijing (then known as Beiping) and became a leader of the Beiping branch of the League of Left-Wing Writers.