Where Did I Travel Through Time in Tomb Robbers?

The protagonist, a half-assed rice cook, unexpectedly traveled through time in a bizarre way. Not only did he travel through time, his body shrank, and his gender changed, but the most important thing was that his background was very mysterious. He had to deal with official duties when he could just hold a pen to write. He lived in the Celestial Master's Mansion in Longhu Mountain, and at the age of thirteen, he became the youngest Celestial Master with undoubted strength. When I was eighteen years old, I went down the mountain and met Wuxie and his group, starting the journey of the "Iron Four Corners". But what the hell is the alien world? Why does Cthulhu still exist? Isn't that Qiao Yingzi? Isn't that Lin Miaomiao? Isn't that Andy from Ode to Joy? Did I come to a fake Tomb Raider Note? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.