Yunreng, born Yinreng, was a Manchu prince of the Qing dynasty. He was the second among the Kangxi Emperor's sons to survive into adulthood and was designated as Crown Prince for two terms between 1675 and 1712 before being deposed. He was posthumously honoured as Prince Limi of the First Rank.

The Kangxi Emperor, also known by his temple name Emperor Shengzu of Qing, personal name Xuanye, was the third emperor of the Qing dynasty, and the second Qing emperor to rule over China proper. His reign of 61 years makes him the longest-reigning emperor in Chinese history and one of the longest-reigning rulers in history. He is considered one of China's greatest emperors.