第4野戦軍
After the nationalist offensive in the southern front had been defeated by the advance communist, Bai Chongxi ordered the nationalist III Corps and XI Corps to immediately retreat. The communist forces at the southern front consisted of units of the communist II Field Army and Fourth Field Army begun the pursuit on November 27, 1949. To boost morale, the nationalist commander-in-chief Zhang Gan (张淦) decided to be the last to retreat and his III Corps headquarters remained behind in the town of Bobai (博白), but this was detected by the attack communists in the afternoon of December 30, 1949. Two regiments of the communist 43rd Army was immediately dispatched to attack the town and reached the town by 8:00 PM on the same day. After breaching the defense of the town at the northern and eastern gates, the attacking communists managed to besiege the surviving nationalists at their corps headquarters located in the library building. After fierce street fights, the battle ended on 10:30 PM on December 30, 1949 with communist victory, and Zhang Gan (张淦), the nationalist commander-in-chief of the III Corps was captured alive with most of his staff. Meantime, the forces of the communist IV Corps from regions of Hua (化) county, and Zhangjiang (漳江) had badly mauled the 48th Army of the nationalist III Corps and then also approached the town of Bobai (博白).