The Yubi War was a significant conflict between the Eastern and Western Wei Dynasties during the Southern and Northern Dynasties. General WEI Xiao-kuan of the Western Wei Dynasty played a crucial role in this war, leading to a turning point in the strategic balance between the two dynasties. His victory not only changed the power dynamics between the Eastern and Western Wei but also had a lasting impact on China's history during the late Southern and Northern Dynasties.