Bi Shiduo (died March 2, 888[1][2]) was a Chinese military officer and rebel of the late Tang dynasty.
By that point, the tide of war had turned against Gao, as Huang had killed Zhang Lin in battle and was advancing north, approaching Huainan's capital Yang Prefecture (揚州).
[2] In summer 887, the warlord Qin Zongquan, who had rebelled against Emperor Xizong's rule at Cai Prefecture (蔡州, in modern Zhumadian, Henan), was sending generals out to attack the nearby circuits.
[2] On May 1, 887,[1] Bi and Zheng, after issuing public declarations denouncing Lü, departed Gaoyou and advanced toward Yang Prefecture.
Bi, who believed that his army was not strong enough to capture Yang Prefecture, sent a letter to Qin Yan, who was then the governor (觀察使, Guanchashi) of Xuanshe Circuit (宣歙, headquartered in modern Xuancheng, Anhui), offering the military governorship of Huainan to him and asking for aid.
Bi ordered his young son to return to Gao Pian, stating, "If the Chancellor executes Lü Yongzhi and Zhang Shouyi [(張守一, a close association of Lü's and also a sorcerer that Gao trusted)] to show me his intent, I will surely not turn back on his grace, and I am willing to have my wife and children serve as hostages."
Gao was forced to meet him and make him deputy military governor, and subsequently transferred all authority over the circuit to him.
Bi subsequently sent a letter to Qin Yan, requesting that he come to Yang Prefecture quickly to take his post.
Lü joined forces with him, as did Zhang Shenjian (who had been angered by Bi's refusal to share the material plunders with him).
The siege continued for months, such that the city fell into a massive famine, and Qin's soldiers from Xuanshe Circuit were eating human flesh as food.
However, on November 18, Lü's associate Zhang Shenwei (張審威) opened the city gates and welcomed Yang Xingmi's forces in.
Their officer Tang Hong (唐宏), believing that Sun would eventually kill them, decided to save himself by falsely accusing Qin Yan and Bi of working in concert with Zhu Quanzhong the military governor of Xuanwu Circuit (宣武, headquartered in modern Kaifeng, Henan).