1984, when Liu Changyou commanded the 40th Division to recapture Laoshan Mountain, his four regimental leaders were Liu Yongxin, Zhang Youxia, Xie and Zhao Koubin. These commanders have been well trained in actual combat.

Liu Changyou participated in many battles, recovered Laoshan for the first time, and carried out large-scale mine clearance work in Laoshan area, which was admired by many people. He made meritorious service in the military camp for 4 1 year, defending the southwest border, and his reputation spread far and wide.