When formulating the plan to annihilate Kuroda, Fu Zuoyi made a record, that is, if he could not succeed, he should immediately change the mode of operation in accordance with the purposes of "avoiding disadvantages and finding victories" and "not losing opportunities and not suffering losses." Now that the original plan had failed, Fu Zuoyi ordered the main force to be transferred, and the headquarters was also moved from Wuyuan to the south desert area of the Yellow River.
On February 3, 1940, after occupying Wuyuan, in order to capture and eliminate the main force of the Sui Army, the Japanese army continued to divide into two roads, north and south, and invaded Linhe and Shaanxi Dam. Suijun's empty room clearance was done very thoroughly, and when the Japanese army entered, the edges of the north and south roads were deserted, and the Japanese army could not find anyone to ask for directions along the way. However, the main force of the Sui Army had long avoided the enemy's front, and all the troops on both sides of the road were intercepted and harassed, so that the Japanese army could drive straight in and take Lin and Shaanxi lightly.
The Japanese army did not make much effort to occupy Linshan and Shaanxi, but the original population and livestock in the two towns had been evacuated and hidden, not to mention the grain and property, and even the wells had been filled. With no supplies to supply, the main force of the Japanese army had to withdraw to the east of the Fengji Canal a few days later, leaving only the pseudo-Mongolian army stationed at Linhe and Shaanxi Dam.
At this point, Kuroda, as the commander of the former enemy, claimed that the Sui army had been completely destroyed, and Fu Zuoyi himself had fled to Chongqing. After all, there is no direct evidence that the Sui army was completely destroyed, and this bull is too much to brag, and some traitors have taken the place of Kuroda Round Field, falsely claiming that they have found out for sure: although Fu Zuo's rebel army has not been completely destroyed, its remnants have fled to Ningxia.
The actual situation is that Fu Zuoyi and his Sui army never left Suiyuan. Knowing that the Suixi Campaign was unfavorable, Chiang Kai-shek sent a telegram to Fu Zuoyi from Chongqing, saying that Zhu Shaoliang, commander of the Eighth Theater, was ill and asked him to go to Lanzhou to serve as acting commander-in-chief, and that the Sui army could appoint another person to take command. Fu Zuoyi knew that Chiang Kai-shek was looking for a name to get him out of danger, so he immediately replied with a telegram and refused, saying that "the soldiers will not leave the army, and the soldiers will not leave the army": They will not leave the army, and the soldiers will have the master; if the soldiers do not leave the army, the formation can survive.
Fu Zuoyi vowed to defend the Loop and regain the lost territory. When the conditions for the counter-offensive were not yet ripe, he gathered the main force west of the Fengji Canal for reorganization, leaving the local guerrillas and a small number of regular troops drawn out to carry out guerrilla warfare east of the Fengji Canal.
According to Fu Zuoyi's plan, on the one hand, the guerrilla units should "lead more with less and fight more with less," and on the other hand, they must also create the illusion that the main force of the Sui Army is indeed far away or unable to fight. This deliberate illusion was embraced by Kuroda and his superior, Okabe. They judged that the main force of the Sui Army had been completely defeated, and it was absolutely powerless to counterattack in the short term, and although there were sporadic troops continuing to attack, it was not enough to be troubled. Under these circumstances, there was no need for a large number of soldiers mobilized from the Pingsui Line and the Tongpu Line to remain in Hetao for a long time.