Lan Tianhua and Dongfang Mo had both been blackened once before, by someone named Bai Xiaochun. Bai Xiaochun was an extremely evil character who would do anything to achieve his goals, including harming innocent people and organizations. In the novel, Bai Xiaochun tortured Lan Tianhua and Dongfang Mo until they gradually lost their humanity and kindness, becoming tools for him to achieve his own goals.