高行周
After the Hedong army conquered Lulong, Li Keyong left the former Lulong officer Liu Rengong in command of Lulong, while leaving a Hedong army at Lulong to assist and guard Lulong. Liu made the Gao brothers the commanders of the forward, the middle, and the rear armies of Lulong, respectively, but either he himself (per the "History of the Five Dynasties") or Li Keyong (per the "New History of the Five Dynasties") was deeply suspicious of the Gao brothers, believing that they would eventually try to take over the circuit. Meanwhile, the Gao brothers imposed strict discipline on both the Lulong army and the Hedong soldiers that Li Keyong left at Lulong, and many were executed for violating laws. Li Keyong was displeased at the killing of the Hedong soldiers and complained to Liu. Liu blamed this on the Gao brothers, killing them. Wanting to appease the people of the circuit, however, as the Gao brothers were popular with the people, Liu made the Gao brothers' sons officers, and at the time, the more prominent one was Gao Xingzhou's cousin Gao Xinggui (), the son of Gao Siji's older brother. Gao Xingzhou was still young at the time, but was also made an officer. (Liu would eventually turn against Li Keyong, turning his Lulong Circuit into a domain independent of Li Keyong's.)