Feng is seven years older than Zhang, and he became famous much earlier than Zhang. Feng joined some green forest organizations when he was 17 years old, and he also had a certain prestige and status in the green forest. At that time, Zhang was just a child. Later, by chance, Zhang joined Feng's organization and worked as his younger brother for a while. The two men forged a good relationship again, and later became sworn brothers with six other people. Zhang later became the king of Northeast China, and his sworn brothers also made a lot of efforts.
Later, when the Revolution of 1911 broke out, Yuan Shikai stole the revolutionary achievements, and Zhang and Feng became the teachers of the 27th and 28th Northeast Divisions respectively. At this time, Zhang has shown his outstanding talent. In order to master the Northeast, Yuan Shikai sent Duan to the Northeast to check and balance the two men. During this period, Feng made no secret of his dislike for Duan, but Zhang was more interested in pleasing Duan, because he knew that Yuan Shikai was the most powerful man in China. Later, Zhang and Feng cooperated to scare Duan away, and Zhang also played the white face.
Therefore, after Duan returned to Beijing, he strongly praised Zhang in front of Yuan Shikai, but spoke ill of Feng. Therefore, Yuan Shikai later elected Zhang as the Fengtian overseer. Feng, who got the news, was also very angry. At first, he colluded with Zhang, but in the end, he got a bargain, so they became sworn enemies from now on. Finally, after Feng Jing was arrested for supporting the restoration, he also lost the opportunity to compete for hegemony.