Caged World+Decisive Killing
Zhang Fan travels through the world of high martial arts, and when he wakes up, he sees his neighbor being dragged away and falling to his death. It turns out that everything is because they are all talented people in alchemy. When he was alive and dead, he awakened the system and escaped.
"The Mystery of the Human Pill" is just an experimental scam by the powerful. When the martial arts comes to an end, everything is a man-made cage and is "fake".
Zhang Fan: "The human elixir, the time traveler, and the martial arts are all fake. Everything is a game. They are all fake, including me."