Ancient pseudo-apocalyptic background
At the beginning of Chi Ning's journey, a heavy fog hit him. There is an unknown monster in this fog, and Chi Ning's small body, just recovering from a serious illness, is obviously unable to deal with it. Fortunately, there was a strong man around to save him.
Chi Ning inexplicably came to a dynasty that he had never heard of, and faced heavy fog and monsters of unknown origin. Fortunately, he bound the plant system.
(The kind of plant from Plants vs. Zombies
Cutting off one's legs again
Purpose: Never give up or give up even in the face of adversity