Traveling Between the Two Realms, Mortals Come to Cultivate Immortality

This is a forgotten time, where immortals catch the stars and the moon, and mortals struggle to survive. This is a legend that belongs to a person who travels between two worlds. One person achieved the Tao of chicken and dog and ascended to heaven! Animals brought from modern times to other worlds will evolve and upgrade, becoming the material for the protagonist's growth.