To better defend the city, Lin Biao redeployed his forces: the 21st Regiment of the 7th Brigade of the communist Western Manchurian 3rd Division, the 67th Regiment and the 2nd Regiment of the Artillery Brigade of the Northern Manchurian 7th Division entered the city to boost the defense, the 55th Regiment and the 58th Regiment of the 19th Brigade of the communist Wan Yi (万毅) Column was deployed in southern suburb, the Shandong 1st Division and 2nd Division were deployed in the northwestern suburb, the 7th Brigade and the 10th Brigade of the Western Manchurian 3rd Division were deployed in the eastern suburb, and 359th Brigade stationed at Gongzhuling as reserve. The 7th Brigade and the 8th Brigade of the communist Southern Manchurian 3rd Column had also successfully severed the nationalist supply line between Changtu and Kaiyuan, Liaoning, thus slowed down the nationalist push on the city. To distract nationalist forces elsewhere and preventing them from reinforcing their comrades-in-arms attacking Siping, other communist units launched separate attacks on the nationalist positions, and by April 18, all of the final nationalist strongholds in Changchun region fell into the enemy hands, and on April 25, Qiqihar fell into the enemy hands, and finally on April 28, all of the final nationalist strongholds in the Harbin region fell into the enemy hands. However, such success only strengthened Chiang Kai-shek's resolve to take Changchun after Siping.