Geng Lao Liu once said, where there are people, there are business opportunities, and bandits are people too, so naturally, they need to conduct business.
After all, the gold and silver treasures they rob would just be a pile of dead objects if they couldn't sell them to launder and circulate the money.
Considering the scarcity of supplies in the mountains, even though every bandit village has land to cultivate, aside from food, the bandits on the mountain still need clothes, weapons, and secret medicines for their training.
Especially the latter two, it's difficult for the mountain dwellers to be self-sufficient, which necessitates trade with merchants.
Geng Lao Liu is such a merchant, and he is one of the few people who can enter and exit major bandit villages without raising suspicions.
Of course, if Qin Feng had died while he was doing business with Black Tiger Village, he would probably still have had a hard time getting away with it.