Initially Mianqin held a title of lesser bulwark duke. In 1796, his second son Yilun, was adopted into Prince Lü peerage due to childlessness of Yongcheng's son, Mianhui. In 1802, he was promoted to beile. He became an only heir apparent of the Prince Cheng peerage, because his brothers Miansi and Mianyi were adopted by childless imperial princes, such as Yongzhang or Yongji.[3] His mother died in November 1813.[4]
Mianqin was posthumously granted a title of Prince Cheng of the Second Rank in 1820.[5]
Family
Primary consort, of the Wumi clan (嫡福晋 乌密氏)
Prince Cheng of the Second Rank Yishou (成郡王 奕绶), first son[6]
Seventh son
Secondary consort, of the Zhaojia clan (侧福晋 赵佳氏)
Third son
Yiwei (1794-1797)
Yisheng (奕绳), sixth son
First Class Bulwark General Yiru (一等辅国将军 奕儒; 1809–1845), eighth son