Why does A Zi want to be vicious and ugly?

Iron ugly is also called Yutan. When Qiao Feng hit Juxian Village, his parents died and he became the enemy of Qiao Feng. He learned that Qiao Feng became the king of Liaonan College, and that the mixture of Yutan attempted to sneak attack on Qiao Feng in the crowd and was discovered by A Zi. After Feng Xiao released Yutan, he sent troops to arrest him and tortured him. In order not to let Qiao Feng find out that he caught Yutan, A Zi put a steel-toed mask on Yutan and called him an iron ugly. You Tan Zhi wants revenge, but he is more infatuated with A Zi and willing to try poison for A Zi. In order to practice Falun Gong, A Zi ordered Youtan to look for poisonous insects to bite himself, regardless of his life and death. You Tan survived because he picked up Qiao Feng's I Ching tendons.