In late August 1947, in accordance with the strategic plan of the Central Military Commission's three-way army to advance into the Central Plains, the Chen Geng and Xie Fuzhi groups of the Jinji-Hebei Luyu Field Army of the People's Liberation Army entered the north bank of the Yellow River in the southern Jinnan region. At this time, the nationalist army was trapped in the northwest and central plains battlefields due to the main force, and the troops defending this section of the Yellow River only had 5 local defense regiments, and there were only 2 integrated divisions and 1 brigade in the vast area from Luoyang to Tongguan, relying on the railway for mobile defense, and the strength of the troops could be described as stretched.
After a short period of preparation, from the night of August 22 to the morning of August 23, Chief Chen Xie organized his troops to cross the Yellow River in two ways, left and right. The enemy's resistance was weak, and Chen Xie's group successfully crossed the river, and then rapidly expanded its attack. By August 31, it had successively conquered many towns such as Huixing, Xin'an, and Luoning, annihilated more than 4,800 enemy troops, cut off the Longhai line, and advanced straight to the outskirts of Luoyang.
Chen Xie's group suddenly crossed the river to shock the nationalist army headquarters, and hurriedly drew 3 integrated divisions and 1 brigade from the main force of Liu Deng's army, plus 4 brigades originally stationed in Luoyang to form the 5th Corps, with Li Tiejun as the commander of the corps, blocking the Chen Xie clique from the east. At the same time, 2 reorganized divisions of the main force drawn from the Hu Zongnan clique in northern Shaanxi withdrew south, arched the important town of Xi'an, and formed the Eastern Shaanxi Corps with 4 and a half brigades to attack from west to east in an attempt to prevent the development of the Chen Xie clique.
In view of the enemy's weakness in the east and weak in the west, Chief Chen Xie used a force to contain the enemy in Luoyang, and the main force advanced towards the enemy's empty Yushan border. From September 2 to 17, Lian Ke Lingbao, Lu Shi, Shaanxi County and other key points annihilated most of the enemy's Eastern Shaanxi Army corps in the movement, directly approached Tongguan, and threatened Xi'an. Chiang Kai-shek in Nanjing was alarmed by the news and quickly dispatched 10 and a half brigades from the Dabie Mountains and the battlefields of northern Shaanxi and southern Jin to deploy in the Tongguan and Xi'an areas, and ordered Li Tie's army to attack westward.
Since the enemy in the west had been strengthened and the enemy in the east was in motion, Chief Chen Xie avoided the real attack and confused the enemy with a force, and the main force returned to the east of the division in disguise on September 26 to seek out and annihilate Li Tie's army. After the battle on October 2, after the annihilation of the headquarters of the enemy's reorganized 15th Division and most of the 64th Brigade, the enemy division commander Wu Tinglin fled to Linru with a small number of guards. After this battle, Li Tie's army was afraid of being hit again, and the main force was retracted back to Luoyang. The Chen Xie clique seized the opportunity to rest and reorganize the troops and open up new base areas.
In mid-October, the Nationalist army concentrated another 10 brigades in the Luoyang area and 8 brigades in the Tongguan area, and once again advanced east-west in an attempt to open the Longhai Line. In accordance with the instructions of the Central Military Commission, the Chen Xie clique continued to contain the enemy with one force on the Longhai Line, and the main force advanced to a vast area south of the longhai line, where the enemy was garrisoned and empty, and rapidly unfolded, with towns such as Baofeng, Nanzhao, Fangcheng, Lushan, Yexian, Linru, and Dengfeng. On November 4, he captured the suburban county in one fell swoop and captured Wu Tinglin, commander of the enemy's reorganized 15th Division.
Subsequently, in order to cooperate with Liu Deng's army, chen Xie's group moved to battle in the western Henan region, using "morning glory tactics" to disperse the tired enemy. The enemy Li Tie's army was confused and had to shrink its strength to retreat to the Nanyou, Luoyang, and Pinghan lines. The Chen Xie clique seized the opportunity to kill back the horse guns and sweep back and forth, annihilated a large number of local defense regiments of the enemy, and dispatched a part of the main force to form military districts and military sub-districts, and let the masses mobilize with their hands, thus establishing a large area of new areas.
By the end of November 1947, after three months of maneuvering, chen xie clique had annihilated more than 50,000 enemy troops, captured more than 10 county towns, established the Yushan Military Region and 8 military sub-districts, initially established base areas, completed the strategic task of containing the enemy to the south and gaining a foothold in the Yushan'e region, and effectively cooperated with Liu Deng's army in fighting with the Northwest Field Army.