After Signing In for a Thousand Years, How Did I Become the Hidden Ancestor of the Human Race

Chu He transmigrates into the Great Desolation world and the Xia clan, becoming a lowly handyman in the Lin residence. He had thought he would spend his life ordinary and humble, but unexpectedly awakens a sign-in system that grants rewards anywhere he signs in.

At the library pavilion, his first sign-in yields the reward [Nine Revolutions Golden Body Art].

After signing in consecutively twenty-one thousand times at the library pavilion, he obtains [Dharma-Form Golden Body].

Believing that the outside world is too dangerous and that being invincible and staying hidden is best, Chu He signs in at the Lin family library for a hundred years.

Until one hundred years later, when the tiger clan launches a massive invasion of the Xia clan and prepares to slaughter countless humans, Chu He finally makes his move!