Zhang Jinlong was born in 1965 in Gangu, Gansu. Peking University holds a bachelor's degree in history, a doctorate in history from Beijing Normal University, and a postdoctoral fellow from Nanjing University. He has published several monographs and dozens of papers. In historical research, Professor Zhang Jinlong has worked diligently for more than 20 years and published more than 5 million words. The Political History of Northern Wei Dynasty, written independently, is a rare and heavy work in recent years. On the basis of doctoral thesis, The Study of Military Attaché System in Wei, Jin, Southern and Northern Dynasties has a unique way, with unique innovations in theory and practice. It puts forward the concept of "Military Attaché System in Wei, Jin, Southern and Northern Dynasties" and makes a systematic study. As an expert in history, Professor Zhang Jinlong's main research directions are: the history of Wei, Jin, Southern and Northern Dynasties, ethnic history, political history and political and military system history.