The Wei Family was powerful. It ranked top three among the seventh rank families affiliated with the Great Buddhist Temple. The Wei Family even boasted Earth Immortal Realm warriors.
But this area was not under the control of the Wei Family, which gave them no advantage. Given the fact that many warriors were lurking nearby, words of hidden treasures must have spread out. More powerful warriors could arrive at any time. It was possible that before Wei Family reinforcement came, treasures would have been taken by others.
In light of this situation, Wei Yuan had offered to split the treasures, hoping that Hu Lang could devote his utmost effort to fight into the underground palace and collect the hidden treasures.
Another factor was Lu Li's honorable status and Wei Yuan had the desire to befriend him. Wei Yuan doesn't clearly know the detailed story but he did know that the abbot of the Great Buddhist Temple had met with Lu Li.