Why didn't Lian Jin 20 reveal the identity of Xiang Shaolong Dragon in front of Lv Buwei?

Because he thinks that Xiang Shaolong replaced Ying Zheng with Zhao Pan in order to climb the throne of power, and Lian Jin is a man who loves fame very much, how could he be stupid enough to do something that is not good for himself? In this way, he will have something in hand, and he will not miss this once-in-a-lifetime opportunity to climb to the top of power.