Zero Degree Reincarnation

The protagonist Zhang Daniu (whose real name is Zhang Taichu, but he thinks he is too middle-aged and insists on being called Daniu because he thinks this name is a tough one) is a "ten thousand year repeater" in the Department of Geology who is studying for bachelor's degree, master's degree and Ph. D./Extreme adventure blogger/part-time food delivery person to experience life. He was raised by his grandfather who picked up rags. Before his death, his grandfather left a notebook full of garbled characters and told him that "the stars are fake and the moon is a monitor." In order to verify whether his grandfather was a madman, he traveled to the extreme corners of the earth until the voice appeared...