Passing by Your World and Touching Your Head belong to the youth literature genre, while Bai Shuo doesn't belong to any particular genre because it's just a name.
Deadpool became Deadpool through a series of complex and sometimes convoluted events in the comics. He was originally a mercenary named Wade Wilson, who underwent experimental treatments that gave him his unique powers and personality.
There is a loose link. The version of Deadpool in Wolverine Origins provided a starting point, but the standalone Deadpool movies developed his character and story in a more distinct and expanded way, deviating from the initial portrayal to create a more focused and engaging narrative.
It's a bit of a mixed bag. While there's a link, the portrayal of Deadpool in Wolverine Origins doesn't fully align with his later, more developed storyline. Some elements were changed or not fully explored.
I recommend " Journey to Another World " to you. This sci-fi space novel also involves the elements of time travel. The protagonist of the story opened an item out of curiosity, leading to a mysterious journey. Just like the novel you mentioned, there are also different mysterious creatures appearing, and the relationship between the protagonist and them is also full of uncertainty. I hope you like my recommendation.😙
Obviously, the main characters are the two Deadpools. They are both versions of the same character but with potentially different backstories and personalities in this graphic novel.