Wang Ya
Subsequently, the imperial guard general Meng Wenliang () was made the military governor of Binning Circuit (邠寧, headquartered in modern Xianyang, Shaanxi), and he requested that Zheng be made commander of in his army. Zheng, however, refused to accompany him to Binning. Only after the deputy chief imperial censor Yuwen Ding () submitted an accusation against Zheng for insubordination did Zheng depart toward Binning, but he never reached Binning before turning back to Chang'an. The imperial censor Li Kuan () submitted a harshly-worded accusation against Zheng, but as the chancellor who received the accusation, Wang Ya, had himself ingratiated Zheng and been commissioned due to Wang Shoucheng's recommendation, Wang Ya suppressed the accusation and did not act on it. The military governor of Zhaoyi Circuit (昭義, headquartered in modern Changzhi, Shanxi), Liu Congjian, wanted to remove Zheng and his influence from the capital, and therefore recommended Zheng to be his deputy military governor. After only a few months, however, Emperor Wenzong suffered a stroke and, for some time, was unable to speak. Wang Shoucheng recommended Zheng to him, and so Zheng was recalled to treat Emperor Wenzong. Zheng was able to help Emperor Wenzong's conditions to improve, and Emperor Wenzong thereafter associated closely with Zheng.