الإمبراطور تشيان لونغ
The Qianlong Emperor originally had two other sons in mind for succeeding him, but both of them died early from diseases, hence in December 1773 he secretly chose Yongyan as his successor. In 1789, the Qianlong Emperor instated Yongyan as "Prince Jia of the First Rank" (嘉親王; or simply "Prince Jia").