Tang Jingyu traveled through time and became a clerk cleaning books in the library of the Imperial Palace of the Tianwu Empire. He thought he would be doing nothing for the rest of his life, but he accidentally activated the sign-in system. If you sign in at any prestigious place, you will have a chance to get rewards. Sign in at the Imperial Palace Library and obtain the skill "Huntian Treasure Mirror". Sign in at the Royal Palace Cemetery and obtain the claw technique "Netherworld Ghost Claw". Sign in at Xinglin Palace and get the medical secret book "Medical Path to Heaven". It's just that it's nice to live in the palace. No one cares about food and drink. Tang Jingyu was prepared to eat and die in the palace and insisted on signing for fifty years. Fifty years later, when the hundreds of millions of alien demons who invaded the Tianwu Continent were about to sacrifice the Tianwu Continent, Tang Jingyu had to take action.
Purpose: I want to write a new story. I found that there are very few such books in Jinjiang, so I want to write it myself.