Records of Mountains and Rivers at the End of Han

At the end of the Han dynasty, the Xianbei besieged Lulong Pass, while the Central Plains faced internal strife and famine. Zhao Feng, a commoner without rank or title, became the 'King of the Northern Frontier' in the hearts of the people. Zhao Yun defended the pass despite injuries, Guo Jia devised border strategies, and Qin Ning stabilized the refugees. They sought not to carve out a kingdom, but to defend the northern borders of the Han with their flesh and blood.