In "The Great Qin Empire", Mi Yan is the son of Empress Dowager Mi Bazi and King Yiqu. Before Mi Bazi married King Ying Si of Qin Huiwen, he met the down-and-out Prince Yiqu. The two had a son, Mi Yan, also known as Yi Quyan.
Ending: Yingzhuang took advantage of Yiqu’s previous grudges with Qin and called Miyan from Yiqu to help. Miyan is Yingji’s half-brother. Mi Yan did not want to help Ying Zhuang assassinate Ying Ji at all, but just wanted to prevent them from fighting each other and resolve their personal grudges. Mi Yan picked up Wei Shu and Mi Bazi's wine and drank it down at the same time.
Extended information:
Miyan’s historical prototype:
"Historical Records. Biography of the Xiongnu" records: "During the reign of King Zhao of Qin, King Yiqurong and Queen Mother Xuan Luan has two sons." There is no record in history as to who the two children born to Queen Mother Xuan and King Yiqu were. There are some differences between the film and television records and the historical records, but it is true that the Queen Mother Xuan had an affair with King Yiquyan, but there was a discrepancy in the time. It is not known whether the two had a son, Yiquyan.
In 272 BC, "Empress Dowager Xuan trapped and killed King Yiqu in Ganquan Palace." It is said that her two sons born to King Yiqu also died with King Yiqu.