返老还童

Rejuvenation

Whenever his Qi and blood weakened and his body functions began to decline, Li Ji'an would rejuvenate and return to his body when he was eight years old...
"It looks exactly like him, he looks exactly like my junior brother when he was a child."
"It looks exactly like him, he looks exactly like the person in my grandmother's painting."
"... Ancestor? Is that you?" "
... The reincarnation of the Taoist Master?"
"... The reincarnation of the Immortal King?"
...
The sun and the moon rotate, and the world rises and falls. The way of heaven rises and falls, and the world rises and falls.
Only I will always be prosperous, and I will only go uphill, in a cycle, endlessly...