Of course Shen Wanxi knew that Xue Liangjing was an advanced player to him.
He fell in love with Xue Liangjing, so he gave him a knife so that he could handle himself like a fish on the chopping board.
There is no doubt that Xue Liangjing plunged the knife into Shen Wanxi's heart happily - seeing that the fish was not dead yet, he stabbed twice with a naive and innocent face.
Intention: youth