How much more incriminating evidence to you think Xi Jinping has on the Biden crime family? He could crush Biden like a bug if he interfered in their military takeover of the South China Sea and eventually Taiwan. Biden is a national security risk that would never get a TS clearance on his won without it being attached to the POTUS.
Xi's dilemma:
Xi wants Biden in the White House. He cannot allow this news to get out and risk having Trump's reelected.
On the other hand, this is an excellent opportunity for Xi to blackmail Biden and control him with the threat of releasing the truth, should he ever (heaven forbid) become President.
What to do?
I think Xi will go with the latter. He'll do his best to "protect" Biden enough to get him into office, then he'll have a puppet in the White House for as long as Biden lasts.