Who is Liu Cheng's master in the Henan Opera "Seven Generations under One roof"?

It's Lan Caihe. Liu Cheng's master in the Henan Opera "Seven Generations under One roof" is Lan Caihe. In the play, Lan Caihe, the master of Liu Cheng, lives in the same Taoist temple with several other Taoists and practices Taoism together to achieve the goal of immortality. Lan Caihe is a famous immortal in Taoism. He is regarded as "one of the three elements of Taoism" and one of the main gods in Taoism. Lan Caihe has a very high status and worship in Taoism, and is known as "the first fairy in the world". His teachings and stories have also become important themes in many literary and artistic works.