Fang Mu restores his longevity by directly injecting large amounts of longevity into his body.
So, even in situations like Ling Kang's, where longevity is exhausted and used to forcibly absorb sources of pollution, it is still possible to recover.
Although Shu Liangjun knows Fang Mu has this ability, he has not mentioned it.
This is because Shu Liangjun still does not know what cost Fang Mu incurs using this secret method to restore longevity.
Such an unnatural method to restore longevity likely comes with a considerable cost.
If Shu Liangjun were to bring it up and Fang Mu couldn't help Ling Kang, it would inevitably be very awkward.
If Fang Mu is willing to help, he will surely speak up on his own!
Qi Qi knows that Fang Mu once helped Shu Liangjun restore his longevity and has thought of this possibility.
However, Qi Qi does not pin hopes on this matter because he never imagined that such a powerful method to restore longevity could exist in this world.
