Censor of All Realms

Hao Jian traveled through time, but the way to open the time travel was wrong. Starting with a dog... No, starting with a book... Strictly speaking, he traveled into Voldemort's diary! In a daze, he became an agent of an alien super civilization! No upgrading, no practice! The Star Destroyer Cannon was fired with all its strength! Okay, I'm exaggerating. In fact, this is a story about a space policeman who leads a group of unusual teammates to explore various worlds. Ps: The world view of this book is based on "Xiling Empire". The worlds traveled in the middle and later stages are all original, not "Harry Potter" fan fiction!