Time Travel: Doomsday Cultivation

Ordinary freshman Xia Mu saw an unopened new book without a title at a small stall and bought it back at a sale. Before I could read the content of the book, my vision went dark. I only remembered hearing a sound that the host had successfully traveled to the world of the novel, and then fainted. When Xia Mu woke up, he found that he was already in another world with another identity. So have you traveled through time and become a character in the book? Is it the protagonist, a supporting role, or a passerby? What kind of novel is this? Can you still go back? Why are the character memories not input into my mind like those written in other time-travel novels? No golden finger? No system? No space either? Not even a mysterious old man or something like that? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.