The introduction of the four major Hui troupes into Beijing refers to the late Qing Dynasty when the four major Hui troupes (Cheng, Mei, Kong, and Zhong) entered Beijing, resulting in the formation of Peking Opera in the capital city. This event occurred from the late 19th century to the early 20th century.
In 1900, the four major Hui troupes entered Beijing, marking the establishment of Peking Opera. However, in this fictional scenario, a key factor is changed: The Qing Dynasty government bans the performance of Peking Opera in Beijing due to political tensions. This leads to a significant shift in the development of Peking Opera and subsequent changes in Chinese performing arts.