Chang Xi clearly knew that, currently, Ye Futian indeed could be considered the top figure in this generation.
It was just that knowing it was one thing. Proclaiming it out in public would undoubtedly draw the crowd's ire towards Ye Futian.
In the Nine Supreme Realms, there were many top forces and countless prominent figures. If someone claimed themselves to be the first, they would instantly be targeted by everyone else. Currently, there were already enough gazes on Ye Futian. Many forces were certainly hoping to get rid of Ye Futian and be done with him. If Ye Futian actually claimed the title of first, the emotions of some parties would also be magnified.