The Legend of the Son of Heaven 4 and 5 both had Doujin novels. The Legend of the Son of Heaven series was a well-known online novel, and four and five of them were completed works. In the Legend of the Son of Heaven 4 and 5, there were many doujinshi novels. These novels usually combined the characters in the original work with the characters in another work to create a new story. Doujinshi novels were loved by many readers and brought new vitality to the original works.