Su Lei had wanted to find an opportunity to kill Wang Ergou after getting back to town. He was a ruthless person trying to achieve great things, so he would definitely kill Wang Ergou if he said so and had already discussed this with Cui Qiang while on the way back.
In the end, it was even Cui Qiang who reminded him that since he had to kill Wang Ergou sooner or later, he should just kill him as soon as possible.
Otherwise, when they returned to town, Wang Ergou might get other ideas and collude with the other bandit groups to steal their business opportunity. If that happened, it would get very troublesome.
After all, Wang Ergou knew the details of their next transaction. What the investor from the grasslands mainly wanted was just goods; he did not care who delivered them.