Strictly speaking, Zhao Hai was now a member of the hundred treasures world, but he was still an outsider there. It wasn't that they wanted him to join the hundred treasures world. He was a member of the hundred treasures world, and he still needed to get their approval.
What could he do to make the people of the hundred treasures world acknowledge him? Naturally, there was no faster way than dealing with the giant spirit race. The giant spirit race and the hundred treasures world were enemies. The more he dealt with the giant spirit race, the more the people of the hundred treasures world would treat him as one of their own.
The main reason why Zhao Hai wanted to join the world of a hundred treasures so quickly was that he wanted to know if Laura's analysis was in line with his. He wanted to know if there was someone behind the world of a hundred treasures who was manipulating him and forcing him to become enemies with the giant spirit tribe.