Between 1925 and 1928 Bo held a number of minor, local positions as a Communist Party organizer in his home city of Taiyuan. After Chiang Kai-shek's Kuomintang (KMT) began to violently suppress communists across China in 1927, Bo went into hiding and continued to organize Communist activities in rural areas. In 1928 Bo was sent by the Party to work underground as a Party organizer in Tianjin.