The World Tree, which can stimulate vitality, not only continuously exudes Wood Spirit Qi but also has a magical effect of preserving youth for humans.
If a Martial Artist trains under the World Tree year-round, they can maintain eternal youth and unchanging appearance.
If a corpse is placed under the World Tree, it will remain lifelike and never decay into bones.
This is why Wu De and the Lightning Mink have been training in the Five Elements Space Ring, unwilling to come out.
Li Fenghou somehow acquired a few World Tree leaves and placed them by his side, which is why his body has remained intact.
Otherwise, after tens of thousands of years, his body would have decayed into mere bones.
"Such a strong and intact body, burying it deep underground would be a waste... Hmm, better put it to use for eliminating evil and promoting good, letting it continue to shine!"