Wen Wen didn't think much about it at that time. Not to mention that he was still young, he was also still in a state of shock at their parents' death. So, for him, he didn't think of what will happen to him and his elder brother after that time. Whether they would wander in the streets and beg for food. It was Wen Yan, who is the older one, who immediately thought of solutions for their miserable situation. After all, they both were still alive, and he also had a younger brother to take care of.
In short, their lives are still going on, unlike their parents who have already died. So, Wen Yan was in a dilemma on how to feed the young Wen Wen. Who knew that the Xinfaxian Sect would give him the answers? Not only will they be fed, clothed, and sheltered, but they can also be taken in as disciples. If they don't want to, then, they can just help the sect to do menial tasks.