From the establishment of the Later Jin Dynasty by Nurhachi in 1616 to the abdication of Puyi in 1912, the Manchu Qing Dynasty went through 296 years (if counted from the entry into the customs in 1644, it is 268 years).
It had the glory of the prosperous ages of Kangxi and Qianlong, and the shame of the Opium War; it had the development of a unified country with multiple ethnic groups, and it also had the ignorance of being closed to the country; it had the efforts of Westernization and self-improvement, and it also had the failure of the reform and reform...
In the end, it was rolled over by the wheels of history and became the last chapter of the five thousand years of Chinese imperialism.