In the colonial era (before American independence), john hancock was a famous American revolutionary, hoping to overthrow British control of the United States by violence. According to legend, when he signed the American Declaration of Independence, he signed his name very chic and big, just to let King George of England (forget, it seems that the name of the King of England was George at that time. . ) Seeing his name, let the king know that john hancock is his number one enemy, which is to overthrow the king's rule over North America 13 colony. Later, it became a household name, and people used its name to refer to autographs.