화제
During the time of Empress Dowager Dou's regency over Emperor He, Zheng served as the director of imperial gardens (鉤盾令). He was one of the eunuchs who did not endear himself to Empress Dowager Dou's clan. In 92, Emperor He, apparently dissatisfied with his suppression by the Dou clan, plotted a coup d'état with his brother Liu Qing the Prince of Qinghe, and Zheng. They were successful in carrying out the overthrow of the Dous, and as a reward, Emperor He promoted Zheng to the post of the Empress' palace's head of household (大長秋). Zheng accepted the post but declined most of the monetary rewards that Emperor He gave him, a fact that made Emperor He even more impressed with him. Emperor He often consulted with him on significant affairs of state, and this started a precedent of eunuchs becoming involved in imperial governance.