Was the Manchu Dynasty a failed dynasty?

The greatest contribution of Manchu is to lay the foundation of modern territory, even though millions of square kilometers of land in modern times were humiliated. But the territory is still larger than that of the Song and Ming Dynasties. As for culture, science and technology, military affairs, economy, ideology, diplomacy and ethnic policies. You've said a lot and you don't mean to be full.

The success of Manchu is not so much the success of Manchu as the failure of Han people. The court struggle in the late Ming dynasty, the rebellion in the mainland, the rebellion of Han people against Daming and natural disasters all contributed to the clarification of the Ming dynasty.

Back to the topic, Manchu Dynasty was undoubtedly successful as a dynasty. In the history of China, 277 years has entered the deadline.