Du Huangchang (杜黃裳) (738 or 739[1] – October 12, 808[2][3]), courtesy name Zunsu (遵素), formally Duke Xuan of Bin (邠宣公) or Duke Xuanxian of Bin (邠宣獻公),[4] was an official of the Chinese Tang dynasty, serving as a chancellor during the reigns of Emperor Shunzong and Emperor Xianzong.
He later served as a secretary to Guo Ziyi, then the military governor (Jiedushi) of Shuofang Circuit (朔方, headquartered in modern Yinchuan, Ningxia).
After Li admitted his plan, Du issued orders in Guo's name to have him and several other officers who were difficult to control sent to various military outposts, to secure the headquarters.
However, he was disliked by Emperor Dezong's close associate Pei Yanling and therefore stuck at his position for some 10 years without movement.
[9] Most of Wang Shuwen's partisans were immediately purged, but Wei Zhiyi, as Du Huangchang's son-in-law, remained chancellor for several months before he was exiled to Yai Prefecture (崖州, in modern Sanya, Hainan).
Later in the year, Gao defeated and captured Liu Pi, allowing the imperial government to take control of Xichuan.
When news of the victory reached Chang'an, it was said that Emperor Xianzong looked at Du and stated, "This is your achievement, Lord.
"[10] Further, Du advocated a fundamental change in the mindset that the imperial government had toward regional warlords — he pointed out to Emperor Xianzong that during Emperor Dezong's reign, to avoid rebellions, he appeased the warlords by giving them what they wanted, but that only caused more contempt for the imperial government.
Traditional historians generally credited Du with this change in mindset that eventually led to Emperor Xianzong's reassertion of imperial authority over the entire realm.
Han's nephew Yang Huilin (楊惠琳) then tried to seize control of Xiasui Circuit but was quickly defeated and killed.