What is known is that he was an army officer from Taining Circuit (泰寧, headquartered in modern Jining, Shandong) who participated in the operations against the major agrarian rebel Huang Chao early in the reign of Emperor Xizong.
It is known that as of 881, when Zheng Tian was serving as the military governor of Fengxiang and the overall commander against the major agrarian rebel Huang Chao — after Huang had captured the imperial capital Chang'an earlier that year and forced then-reigning Emperor Xizong to flee to Chengdu — Li Changyan was serving as the commander of the Fengxiang forces (行軍司馬, Xingjun Sima) and stationed at Xingping (興平, in modern Xianyang, Shaanxi).
Manu Chao | Chao Phraya River | Chao Gai | Qin Shi Huang | Grace Huang | Chao | Rosalind Chao | Ray Huang | Huang Zu | Huang Feng | Huang Chao | Elaine Chao | Huang Zhong | Huang Huahua | Andrew Huang | Yuen Ren Chao | Tuoba Huang | Stanley Huang | Murong Huang | Huang Xiang | Huang Wei-yi | Huang Shiping | Huang Sheng Shyan | Huang Ruo | Huang Rui | Huang Qifan | Huang Huidan | Huang Chunming | Fogo de Chão | Chao Samartín |
In early 884, Li Keyong led his troops to attack the anti-government rebel force of Huang Chao, and Shi was the vanguard general to assist the besieged cities of Chenzhou (陳州; in modern Zhoukou, Henan) and Xuzhou (許州; in modern Xuchang, Henan).
Its Director, Dr. Shih-Huang Chao, the Chief Consultant, is a surgeon also known for inventing the gastric clipping weight loss method (a surgical procedure that can be done within 30 minutes), which has been granted patent in the United States, Japan, and Taiwan.