Manchu were not nomads. They were a settled people.The Qing dynasty were certainly not Han Chinese, ethnically speaking. They are Manchu (Jurchen), a nomadic ethnic group with a lifestyle more in common with Mongols and Turks but are linguistically Tungistic, related to Siberian cultures.
Qing in that regard is like the Frankish empire. Franks are settled people from Germania and the associated traditions ruling over a Gallo-Roman population with a different tradition.