After I entered the book, I found the villain

Jiang Lian traveled to a novel about cultivating immortals. By diligently playing the villain and following the plot, he thought that he would be able to return to his original world after the protagonist changed the map and left.
Thirty years later, Jiang Lian, who had become the leader of the Immortal Sect, was lost in thought as he held the sequel to the novel.
Along with them came a group of future villains who were still teenagers.
Jiang Lian: "If you don't want it, get out!"
"Villains are protagonists who have been misplaced. They all have tragic pasts, which has led them further and further down the path of evil," the Villain Development System explains. "And, when the villain destroys the world, you might die..."
Jiang Lian: “…”
Several years later, Jiang Lian watched the villains who had grown into emperors suppress the protagonists.
“This style of painting is wrong!”

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