郑注
Around the new year 835, Emperor Wenzong commissioned Zheng as the minister of agriculture (太僕卿, "Taipu Qing"). As the advisory official Zheng Chenggu () opposed the appointment harshly, Zheng Zhu initially declined it, but eventually accepted in summer 835. Meanwhile, he was grateful to Wang Fan for having revealed Song Shenxi's plan to have him killed, and because Wang Fan was also friendly with Li Zhongyan (whose name was changed by this point to Li Xun), they jointly recommended that Wang Fan be recalled from his position as the governor of Zhexi Circuit (浙西, headquartered in modern Zhenjiang, Jiangsu) to serve as one of the secretaries general of the executive bureau of government (尚書省, "Shangshu Sheng").