Great Ming: I'm the Celestial Emperor, and I've Been Signing In at the Imperial Palace for Sixty Years

Mu Chen transmigrates to a parallel universe and becomes a lowly eunuch in the Great Song Dynasty. From the start, his martial arts aptitude is tested and deemed good-for-nothing. He expects to spend his days pouring tea, fetching water, and cleaning chamber pots for the nobles, but then he activates the Sign-In System.

Sign in at the Eastern Depot in the imperial palace, and receive the Sunflower Manual.

Sign in in the Golden Throne Hall, and receive the Rinnegan.

Sign in at Kunlun Void, and receive the Heaven-Swallowing Demonic Art.

Mu Chen is determined to keep a low profile until the 21st century, avoid worldly affairs, and devote himself to cultivation. But sixty years later, the Song Dynasty is corrupt and incompetent, unable to resist the invasion of a million cavalrymen. They burn, kill, and loot, leaving the people destitute, and the Song people's legacy is on the verge of destruction.

Mu Chen has no choice but to emerge from seclusion ahead of schedule...