Zhang Yong&;s title of &”;the father of paper money&”; is recognized by the world. Most people know that the electric light was invented by Edison, but it is rare to know that paper money was invented by Zhang Yong. Unfortunately, there was no intellectual property right at that time. It is said that there is a rare mulberry variety in Britain in the center of the Bank of England. This variety comes from, and it was planted to commemorate the invention of Zhang Yong making &”;crossing&”; with mulberry leaves. This story happened roughly in the fifth year of Chunhua. During that period, the rebels made their own insurrection. Zhang Yong, who had just been transferred, was the Yizhou Prefecture at that time. He was on the run, fighting fires everywhere and rioting. Wang Xiaobo, the leader, was killed by Zhang Yong. Li Shun was promoted to be the leader and was defeated by Zhang Yong. He conquered Chengdu in one fell swoop, captured Zhang Yu, the bandit leader, and defeated Liu Gang. At that time, Chengdu was baptized by the war, and people were frightened and the military was unstable. In order to boost morale and cheer up, Zhang Yong proposed to review the troops. Somehow, the excited soldiers shouted &”;Long live!&”; This situation was very taboo in the Song Dynasty, and it was not just a slogan. At the beginning, Song Zu Zhao Kuangyin made a blind noise by relying on the &”;Zhao Guangyi&”;, and he reluctantly became the emperor. Later, he had the &”;right to relieve the soldiers with a glass of wine&”; (untrue). Now suddenly, a group of soldiers called Zhang Yong long live, and Zhang Yong was not far from death. At that time, it was useless to reprimand the soldiers, so he had a brainwave, rolled his saddle and dismounted, knelt on the ground, faced the Kaifeng direction, bowed his head and said &”;.