1947, according to Mao's strategic deployment, he jumped into Dabie Mountain and divided the three roads in East China, all of which were repelled by the concentrated national army and suffered heavy losses. Among them, Liu Deng lost about 654.38 million people before and after, and Chen Su lost 50,000-60,000 elites. The war situation in East China and Central China changed from favorable to unfavorable.

In order to change the relatively unfavorable situation, the Mao He Military Commission (except Mr. Zhu) formulated a strategy to attract the four main forces of the national army (18, 5, 7 and 48) to the south of the Yangtze River, so as to reduce the pressure on the Central Plains, and asked the Soviet Union to take three main columns of Hua Ye to cross the river and fight south.

Sue suffered heavy losses because she obeyed Mao's orders to divide her troops, which deepened her doubts about the feasibility of Mao's decision. Moreover, considering that the three main columns of Hua Ye will not be able to solve the problem of carrying heavy weapons when crossing the river, they will inevitably be forced to give up the mechanized heavy weapons in the United States like Nakano, and change from the absolute main force that the elite of the national army is very afraid of to a guerrilla force with weak combat power. Moreover, the National Army will not be stupid enough to deploy the four main forces of the National Army (18 Army, 5 Army, 7 Army and 48 Army) to fight in Jiangnan.

Therefore, Su almost categorically denied Mao's wishful thinking, but still maintained respect when making counter-suggestions. Because of Zhu's absolute support for Sue, and Chen Yi's claim that Sue has the necessity to go south, and he doesn't want Sue's main column to leave the Central Plains due to his own serious pressure, Mao could not form the final order in the CMC.

Therefore, the Central Military Commission specially asked Sue to leave the front line and go to the central station to discuss in detail. After Su's "Confucianism on Taoism" and Su's written promise, all Party officials supported Su to stay in the Central Plains, and Mao could not change his original plan. He took his anger out on Chen Yi and transferred Chen to the Central Plains as a handyman. Sue fully represented Hua Ye's leadership work, and Mr. Zhu personally took Hua Ye to convey and set up Sue's authority.

This period of history was later called "Su Yu disobeyed orders to cross the river".