9个数字2个一组能组成多少组

简介：Both Zhang Jiayu and Zhang Mingzhen have read Ji Xiao's new book, but the book only records the details of the troop arrangement and the equipment used in the Yuanyang Formation, but the most important thing is how to deploy the troops and the specific tactical changes on the battlefield. To elaborate - how to practice and how to convert depends on the understanding of the two people.