Space and Time Administration

In 2009, an ordinary junior high school student got a strange stone and traveled through time and space. I can't write the introduction anymore, why do I need 100 words? I'm just going to say something casually. It's my first time writing a novel. Because it's science fiction and it's time travel, there are some places where I'm not rigorous. I apologize in advance. . . . . . . . . This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.