Li Mao was dissatisfied with Li Yongbo's style. At that time, he tried to impeach Li Yongbo, but failed, so he ran away from Guoyu. After the impeachment failed, Li Mao left in grief and indignation. In order to win a sigh of relief, he went to South Korea and Malaysia, bringing players such as Li Xuanyi, Song Seung Heon and Li Zongwei to the top level in the world. It can be said that the contradiction between Li Mao and Li Yongbo was later transferred to the badminton international arena. Li Mao is not without feelings for China Guoyu. He once asserted that Li Yongbo might come back after he stepped down: "After that man leaves, I will probably return to China."

Li Mao recalled, "I heard the story of the wolf coming. Before jointly impeaching Li Yongbo, I talked with Li Yongbo three times, and he also said that he would give me the position of head coach, and he would be the men's singles coach. I said I can't be a head coach, but I'm only fit to shine in the position of men's singles head coach. 1February 1998, I talked all night in Manila and Li Yongbo, as if I had touched God. " "We had a good talk the next day. Li Yongbo called me' Brother, Brother' to my face, but it hasn't changed since I came back. We decided to appeal jointly. "

In that appeal, except Tian, all the other members of Guoyu coaching staff signed a letter to impeach Li Yongbo. Later, the training bureau announced the results of the investigation, which read: "There is no problem of embezzlement and misappropriation of public funds in Li Yongbo, and the main responsibility lies in poor leadership and management." Subsequently, Li Mao, Li and other coaches who impeached Li Yongbo all left Guoyu, and the feud between Li Mao and China badminton team began.

In the end, Li Yongbo remained as the head coach of China badminton team, while Li Mao, the head coach of men's singles, and Li, the head coach of women's singles, left angrily. Li Mao said: "Li Yongbo's work style is secondary, mainly because there are too many messy things." So the feud between Li Mao and Li Yongbo is quite deep.