Traveling Through **********

Heer, Heer, Heer! ! ! Looking for a Book with the Main Character Honkai Sanxier

The protagonists, Xi'er and Bai Xi'er, are the best. Those without time travel would be even better. Those with knives would be super invincible! ! ! Of course, other conditions are not mentioned, as long as there is no time travel, no system, and the word count is more than one million!