大小单双的规律怎么看

简介：Guide's ancient name was Suiyang. During the Anshi Rebellion in the Tang Dynasty, Zhang Xun and Xu Yuan defended Suiyang with no food and reinforcements inside. They fought more than 400 times, causing heavy losses to the rebels. It effectively prevented the rebels from invading the south and bought valuable time for the court to regroup. For this reason, Zhang Xun and Xu Yuan were both admired by future generations.