Murong Hao led a million troops to the border. The brave general Lu Hanyuan and the resourceful and mysterious military division made the border guards of the black cloud country have no power to fight back. They were about to reach the capital of the black cloud country, but they were stopped by the first general of the black cloud country, general Guangli.

although Murong Hao has an advantage in manpower, Guangli is familiar with the landform of hukou.

Hukou is located three hundred miles south of the capital of the black cloud country. The terrain is quite high. It has been easy to defend and hard to attack since...