Qianniuwei was born in the Tang Dynasty, but it took shape as early as the Northern Wei Dynasty, that is, Qianniuwei was originally named Qianniubei. It is a high-end bodyguard officer who is in charge of the emperor's life safety, and also in charge of the emperor's imperial knife "Thousand Ox Knives", which is derived from the book Zhuangzi. "You have solved more than a thousand cows, but if the blade is newly developed." Neglect is a seller who can kill a thousand cows with a sword. Thousand ox knives are the emperor's self-defense tools, so they are very important. During the Southern and Northern Dynasties and the Liu and Song Dynasties, Xiao Zixian, the little grandson of Gao Qi Emperor Xiao Daocheng, killed Liu Yu with his magic knife. "Thousands of cows bring their own" first appeared in the Western Han Dynasty. Since then, the Northern and Southern Dynasties have set up this Wu Zhi.

Those who can enter Qianniuwei must be children of Yin Gao, well-connected, young and handsome, and well-educated. After all, the true identity and brand image of the imperial army are very important. According to Records of the Old Tang Dynasty Twenty-two Officials No.1, Qian Niuwei's daily duties are: preparing his body, holding a crossbow, staying behind as a bodyguard, and serving the province. Get ready and go and greet the waiter. Thousands of cows are guarded by crossbows from top to bottom, and the main battle is to protect ships. On the day of the court, he was taken up and down the temple, and the attendants were listed on the throne. If you shoot at the palace, the general and the general will lead them to follow. Where did you come from? The system of preparing for the next exam and adjusting your rank is the same as that of Beijing officials.

Anyone who prepares a thousand oxen and worships in the temple with a royal knife will be led by a general and replaced by a corps commander. Anyone who serves crosses the front of the seat, talks to others, leans over to talk to the people below, and raises his head and hands to signal. If there is a complaint, the commander will announce it under the condition that he promises to spread the voice in the next step. In ancient history, the role of Yan did exist. He once held positions related to laws and regulations such as Dali Temple Cheng, and handled more than 7000 cases a year/kloc-0. The efficiency of hearing cases is much more exaggerated than in TV dramas.

More importantly, every case he solved was recognized by the people under trial, and he didn't say that he decided casually for efficiency. Because of her good reputation and strong working ability, Yan was eventually promoted to prime minister in the period of Wu Zetian to solve state affairs. However, Yan exists in history, but his supporting role does not exist in history. There is no such person as Li Yuanfang in history. He is just a fictional character in the case of shooting TV series, and there is no relevant prototype in history. Naturally, this does not prevent people from mastering the official title of Li Yuanfang. After all, their official titles are real in history.