By 1 May 1947, it was obvious to the nationalists that Yangquan could not be held any longer. Yan Xishan ordered most of the defenders, including the 46th Division of the 33rd Army and the Independent 10th Division to retreat westward, while the 5th Group, consisted of 500 former Japanese troops enlisted in Yan's army were ordered to stay behind to guard Lion Brain Mountain (Shi Nao Shan, 狮脑山) to cover the general retreat. However, the retreating nationalist main force met stubborn enemy resistance and was stopped surrounded by the enemy at the regions of Zhaiyu (寨鱼) and Ceshiyi (测石驿). On 3 May 1947, under the communist's overwhelming political offensive, the 500 member strong nationalist 5th Group surrendered to the communists. On 4 May 1947, nationalist defenders at Zhaiyu (寨鱼) and Ceshiyi (测石驿) region could no longer holdout and attempted to breakout, but unfortunately, they were ambushed on their retreat and most were killed. On the same day, nationalist defenders at Shouyang (寿阳) abandoned their posts under communist's overwhelming pressure and fled to Yuci. The communists did not end the campaign until they chased the retreating nationalist force all the way to the suburb of Yuci.