《资治通鉴·宋纪·宋纪四》
杨难当派他的儿子杨和率兵与蒲甲之等共同进攻萧承之，双方对峙四十多天。氐王的军队将萧承之的部队包围了几十重，两军短兵相接，弓箭飞石都无法施用。
杨难当遣其子和将兵与蒲甲子等共击萧承之，相拒四十馀日，围承之数十重，短兵接，弓矢无所复施。
Yang Nandāng sent his son Yang He to lead his troops and fight together with Pugiàzhi and others against Xiao Chengzhi. The two sides were deadlocked for more than 40 days. The Di army surrounded Xiao Chengzhi's troops with dozens of troops. The two armies fought close, and it was impossible to use bows and arrows and stones.