and their family members. When the Shiwei requested to ransom the hostages, Zhang refused their payments — and stated that he would return the hostages as soon as the Shiwei also killed Huigu emissaries to them. (It is not clear how the Shiwei responded at the time.) Later in the year, Emperor Wuzong ordered Zhang Zhongwu to rendezvous with Liu Mian () the military governor of Hedong Circuit (河東, headquartered in modern Taiyuan, Shanxi) and the Huigu noble Li Sizhong, who had submitted to Tang and become a Tang general, at Hedong's capital Taiyuan, to further plan a major attack against the Huigu remnants led by Wujie Khan. Both Zhang and Liu opined that an attack should not be made in the winter, however, and so this attack never took place. In 843, Liu made a surprise attack, led by his officer Shi Xiong, against Wujie Khan, crushing Wujie Khan's forces and rescuing Princess Taihe, a Tang princess (Emperor Wuzong's aunt) who had married a prior khan, Chongde Khan. Wujie Khan fled, largely ending the Huigu threat. It was said that because Zhang was angry that Liu took the credit for the victory over the Huigu that Zhang and Liu subsequently developed a rivalry. Later in the year, when Liu was one of the generals ordered to attack the warlord Liu Zhen, who had seized Zhaoyi Circuit (昭義, headquartered in modern Changzhi, Shanxi), the other circuits around Zhaoyi were also commissioned, but Emperor Wuzong did not request Zhang to launch his troops as well, stating instead that Zhang should watch the border for possible further Huigu attacks. After the campaign against the Huigu Still, Emperor Wuzong was worried that the rivalry between Zhang Zhongwu and Liu Mian would interfere with the Zhaoyi campaign, and therefore (after the imperial emissary Li Hui was unable to moderate the strain between Zhang and Liu) soon transferred Liu to Yicheng Circuit (義成, headquartered in modern Anyang, Henan). The former chancellor Li Shi was made the military governor of Hedong, but soon, a mutiny led by Yang Bian () expelled Li Shi. In the aftermaths of the mutiny against Li Shi, Emperor Wuzong considered sending Zhang to attack Yang, but Li Deyu pointed out that, due to Zhang's and Liu's rivalry, Zhang might bear a grudge against Hedong Circuit in general and might kill excessively, so Emperor Wuzong did not send Zhang. (Yang's mutiny was