During the Emperor Wu Period, it was only a tide of primordial Qi and not a true resurgence of spiritual energy.
This could not have been accomplished by Emperor Wu without his operation.
Of course, Zhao Xing couldn't say this directly; he also had to consider various aspects, just as he advised Emperor Wu, he couldn't act too hastily.
He might have to reveal the truth in the future, but that would have to be when he is absolutely invincible, and there's no chance the emperor could kill him.
Otherwise, if he were to tell Emperor Wu everything, what if Emperor Wu panicked? Without absolute certainty, Zhao Xing couldn't disclose everything.
Currently, Ji Che is ambitious and still young, but when he's nearing the end of his life span or realizes there's no hope of ascending, who knows what the emperor might do.
At this stage, it's best to go with the flow; it's not yet time to go against the heavens.
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