A person in the Song

“We couldn't determine the origin. Last night, a heavy rain suddenly appeared in the back garden. In my belongings, I found a strange object with this person's portrait on it, claiming to be Zhao Jun, born on February 15, 2000. The back also wrote "People's Republic of China Resident Identity Card...",“A big eater Could he be a person from the land of the Big Eater”,"If he truly comes from the future, knowing his own position in the previous dynasty, would everything he says still be the truth If he reveals some statements to prove this and convince us, wouldn't it mean he could slander anyone he wants at will Then, with the power of decision in his hands, would we believe him or not"。