Why did Celestial Bane have to be based on Celestial Bane novels?

Celestial Bane was adapted from Celestial Bane because it was a very popular wuxia novel with a large number of readers and fans. Game production companies often chose to make games based on novels because this would attract more players to pay attention and buy the game. Adapting the game could also bring a new gaming experience to the novel readers, allowing them to feel the feasibility of the plot and characters described in the novel in reality.