高行周
Gao Xingzhou was born in 885, during the reign of Emperor Xizong of Tang. His family was originally from You Prefecture (幽州, in modern Beijing), but his male-line ancestors had served for several generations (since his great-grandfather Gao Shunli () at Huairong Base () at Gui Prefecture (媯州, in modern Zhangjiakou, Hebei), which belonged to Lulong Circuit (盧龍, headquartered at You Prefecture), and Gao Xingzhou was born at the fortress at Huairong. Gao Xingzhou's father Gao Siji () and Gao Siji's two brothers (one older, one younger, whose names are lost to history) were all known in the region for being brave and capable in military matters. In 895, when the major warlord Li Keyong the military governor ("Jiedushi") of Hedong Circuit (河東, headquartered in modern Taiyuan) was preparing to conquer Lulong, Li Keyong claimed to be avenging the prior military governor of Lulong, Li Kuangwei, as then-military governor of Lulong, Li Kuangchou, was a younger brother of Li Kuangwei's but had seized Li Kuangwei's circuit in a coup. The Gao brothers, believing in Li Keyong's assertions, joined the Hedong army and participated in the successful Hedong operations to conquer Lulong.