Hong Taiji
In 1629, when Hong Taiji invaded China, Amin was left at Mukden as regent. After Hong Taiji returned to Mukden in April 1630 Amin was sent to Yongping to guard the four cities that had been recently conquered. Amin arrived at Yongping on May 6, but soon the Ming troops counter-attacked and defeated the Manchus in several battles. On June 22, when the Ming troops were approaching Yongping, before fleeing the city with his troops, Amin disobeyed the orders of Hong Taiji by plundering and massacring the population of Yongping. Upon his arrival at Mukden in July 1630, Amin was arrested and tried for fleeing from his post, disobeying orders, for not having confronted the enemy in a single engagement, for losing many of his troops, and for other misdemeanors. A council of princes and high officials condemned him to death on sixteen counts, but Hong Taiji intervened and commuted his sentence to incarceration. Amin died in prison in 1640.