After his father died in 1634, Ejei and his mother were surrounded by over ten thousand Later Jin cavalry in a surprise attack in February 1635.
Weighing their options, Ejei and his mother decided to surrender and was said to have given the imperial seal of the Yuan dynasty to Hong Taiji.
For his contribution, Ejei was awarded the rank of Prince (Qin Wang, 親王), a title he held until his death in 1641, and inherited by his younger brother Abunai (阿布奈).
[citation needed] Abunai (阿布奈) openly showed his discontent toward the Qing dynasty and he was put under house arrest in Shenyang by the Kangxi Emperor in 1669 and his imperial title/rank was given to his son Borni (布尔尼) in September of that same year.
Borni (布尔尼) was careful to not show any sign of disrespecting the Qing dynasty, but finally in 1675, he suddenly rebelled along with his younger brother Lubuzung (罗布藏), capitalizing on the Revolt of the Three Feudatories.