During the War of Resistance Against Japanese Aggression, Shanghai fell, and Du Yuesheng called on many apprentices in Shanghai to help Dai Kasa provide a lot of enemy intelligence and make a lot of merits. After the victory of the Anti-Japanese War, in return, Dai Kasa often hinted to the people around him that Du Yuesheng would be the first mayor of Shanghai. People asked Du Yuesheng whether this matter was true or false, and Du Yuesheng also laughed and said nothing. But his apprentices went around saying that Mr. Du would become mayor of Shanghai in the future. After some Shanghai people believed it to be true, they recognized Du Yuesheng as the boss and gave Du Yuesheng shares, thinking that they would avoid the enemy and counterfeit assets from being seized by the government in the future.
Later, once Dai Kasa and Du Yuesheng held a separate meeting together. After the meeting, Du Yuesheng announced to everyone that Shanghai was safe and would soon go. A few days later, Du Yuesheng went to Shanghai, and as soon as he got on the car, someone suddenly reported the news to Du Yuesheng, and the vice mayor of Shanghai let Wu Shaoshu be the one. Du Yuesheng's face suddenly darkened, and he took a few sips of his cigarette. Du Yuesheng instantly felt that all his efforts had been in vain.
When Wu Shaoshu was young, he once received help from Du Yuesheng. Later, after Wu Shaoshu couldn't mix in Shanghai, he threw himself under Du Yuesheng's door, and Du Yuesheng introduced him to Dai Ka. After Wu Shaoshu became the vice mayor of Shanghai, he did not even say hello to Du Yuesheng, and everyone did not know where Wu Shaoshu was. Wu Shaoshu now holds a lot of power in Shanghai, and if he wants to say nothing in Shanghai, he will inevitably overthrow the biggest power in Shanghai. At this time, the biggest force in Shanghai was Du Yuesheng. Later, Wu Shaoshu listed Du Yuesheng as the first target to be hit, and wanted to overthrow the former benefactor. Wu Shaoshu also had people post large characters, "Du Yuesheng is the representative of the evil forces!" "Down with the big rogue Du Yuesheng!" ”。 Attacked Du Yuesheng on a large scale.
Once, Du Yuesheng was entertaining guests at his home in Shanghai, when suddenly someone reported that Vice Mayor Wu Shaoshu had arrived. Du Yuesheng was very happy, thinking that his disciple could still remember him, and immediately got up to greet him. After Wu Shaoshu entered the house, his attitude changed completely from before, and after talking to Du Yuesheng a few official words, he excused himself and left on the pretext that he still had official affairs to do, completely did not give Du Yuesheng face at all, and embarrassed Du Yuesheng in public. Many of the disciples present gritted their teeth and threatened to find Wu Shaoshu's theory, and it was not possible to have this evil breath.
A few days later, Du Yuesheng came up with a way to deal with Wu Shaoshu. Since Wu Shaoshu wanted to be the emperor of Shanghai, Du Yuesheng now avoided his sharp edge, did not mention the merits of the anti-Japanese period, and chose to go into hiding. At the same time, Du Yuesheng refused all public occasions, not even the gatherings of the Chamber of Commerce. No matter who went to find Du Yuesheng, Du Yuesheng praised Wu Shaoshu to people.
On the other hand, Wu Shaoshu must draw a clear line with him, openly threatening to overthrow Du Yuesheng and want to establish authority. Wu Shaoshu also arrested many of Du Yuesheng's apprentices for adultery, and Du Yuesheng himself was also found to find an excuse to detain him. Later, when Shanghai was collecting money to support the civil war, Du Yuesheng was forced to exchange the money for a free body. In the midst of constant beatings, Du Yuesheng eased up. Du Yuesheng still had many disciples in Shanghai, and he had the help of his friend Dai Kasa. With the cooperation of many of Du Yuesheng's disciples and Dai Kasa, Dai Kasa had evidence of Wu Shaoshu's corruption and private traitors. After reporting the evidence to Chiang Kai-shek, Wu Shaoshu's mayor was finally dismissed, and Dai Kasa gave Du Yuesheng a bad breath.