C835 First Attack the Female Truth Then Take the Grasslands

"This also means that the ice on the Bohai River is much thicker than before."

In the past years, the Nuzhen Tribe attacked the Central Plains every year. However, they chose to attack during winter because the Bohai Sea River was frozen during winter. The thick ice could allow them to come directly from the surface of the river.

However, the capacity of the ice was limited