Prince Qing of the First Rank, or simply Prince Qing, was the title of a princely peerage used in China during the Manchu-led Qing dynasty (1644–1912). It was also one of the 12 "iron-cap" princely peerages in the Qing dynasty, which meant that the title could be passed down without being downgraded.

Zaizhen, courtesy name Yuzhou, was a Manchu prince and politician of the late Qing dynasty. Romanised forms of his name include Tsai-chen, Tsai-Chen, Tsai-Cheng.