What is the treasure in Chongzhen's hand? With it, the Qing dynasty didn't want to enter the customs, but it was stolen.

I think it's either a red gun or trust in Yuan Chonghuan. The power of the red cannon is infinite, and Nurhachi was directly or indirectly injured by this cannon and died. On the other hand, trust in Yuan Chonghuan. Yuan Chonghuan can be said to be the magic weapon of Chongzhen's final comeback. He can be used as a double agent by Huang Taiji and finally executed by Chongzhen for treason. It can be said that Chongzhen was stolen by Huang Taiji's trust in Yuan Chonghuan!