Zhao Hai naturally couldn't tell Xia Yu the whole truth. What he knew about Xia Yu now was completely what Xia Yu said himself. He didn't know if it was true or not. He had said before that they had defeated the evil spirit sect. In fact, he was telling Xia Yu that they were not weak and were very strong. He had better not have any crooked ideas.
Zhao Hai's approach was very good. At least, he still accepted Xia Yu. He just hinted in his words that if Xia Yu really did not want to harm them, Zhao Hai would naturally not be polite.