How to evaluate Max Zhang's performance in Kill the Wolf 2?

Actually, there is a detail. If Max Zhang plays the bad guy, he won't give Achai money to save his daughter. He will find a suitable person to donate bone marrow. Chai and another prison guard secretly let his uncle meet, and they are bound to be beaten. Most importantly, when Louis Koo first appeared and said that Max Zhang was his return, Max Zhang's expression changed slightly. In fact, I think Max Zhang has played a contradictory role.