Zhu Kerong (Chinese: 朱克融) (died 826[1]), formally the Prince of Wuxing (吳興王), was a military governor (jiedushi) of the Chinese dynasty Tang dynasty who ruled Lulong Circuit (盧龍, headquartered in modern Beijing) independent of the imperial authority during the reigns of Emperor Muzong and Emperor Jingzong, until he and his son Zhu Yanling (朱延齡) were killed by their own soldiers in 826.
[7] The imperial government reacted to the mutiny by ordering that Zhang be demoted, while transferring Liu Wu the military governor of Zhaoyi Circuit (昭義, headquartered in modern Changzhi, Shanxi) to Lulong.
Liu Wu, however, feared Zhu Kerong's strength and did not dare to try to head to Lulong, so Emperor Muzong allowed him to return to Zhaoyi.
Meanwhile, with Wang Tingcou also having mutinied, killed Tian Hongzheng the military governor of neighboring Chengde Circuit (成德, headquartered in modern Shijiazhuang, Hebei), and took over control of Chengde, Zhu and Wang allied and put Chengde's Shen Prefecture (深州, in modern Hengshui, Hebei), whose prefect Niu Yuanyi (牛元翼) had refused to follow Wang, under siege.
However, Zhu and Wang (who was also pardoned and commissioned shortly after) continued to have Shen Prefecture under siege, and after they captured Gonggao (弓高, in modern Cangzhou) to cut off the supply routes for the imperial troops, the imperial forces and Niu were in desperate straits.
When Pei Du the military governor of Hedong sent letters to rebuke them, Zhu withdrew from Shen Prefecture, although Wang continued to put Shen Prefecture under siege, forcing Niu to eventually fight his way out of the siege.
Both Wang Tingcou and Zhu sent arrogantly-worded offers to contribute troops to repair the long-ruined palaces and governmental offices at Luoyang, offers that Emperor Jingzong declined, and Emperor Jingzong subsequently abandoned the plan to visit Luoyang, at the urging of Pei Du, who was then chancellor.
Emperor Jingzong was angered, but at Pei's urging sent edicts with kind words to calm Zhu, and created him the Prince of Wuxing.