On the 1st of November 1926 (September 26, 1926), the Northern Army attacked the main force of Southern Chongqing. The Northern Army's chariot was destroyed by the Jiangxian Station to the front line on November 1, 1926, the second phase of the Nanjing operation began. Two times the Nanjing defeat, Chiang Kai-shek realized that in order to occupy Southern Chongqing, the Sixth Army must first occupy Southern Chongqing, cut off the enemy's supply line against Southern Chongqing, so the Fourth Army was adjusted to the front line. After the preparation of the work, on November 2, the Seventh Army again attacked the important base on Southern Chongqing Road, cut off the enemy's border of Southern Ch