Yes and no, depending on what “Chinese” means. The Manchus are a Tungusic ethnic group native to Manchuria in Northeast Asia, and today they are an officially recognized ethnic minority in the People’s Republic of China, so most Manchus are Chinese citizens. They are not Han Chinese, the country’s majority group; China’s 2020 census counted about 10.4 million Manchus, making them the country’s fourth-largest ethnic group.
The Manchus descend from the Jurchen people and founded the Later Jin (1616–1636) and Qing (1636–1912) dynasties, which ruled China until the end of the imperial era. Manchu is their native language, but Mandarin Chinese is now the language most Manchus speak.
Source: Wikipedia, “Manchus,” citing China’s 2020 census and the China Statistical Yearbook 2021.
Image: Manchus dressed as royal family by Outu, CC BY-SA 3.0, via Wikimedia Commons.