进一退二投注法的例子

简介：However, that year was an eventful year. Cao Wenzhao died in battle, Zhang Xianzhong conquered Fengyang, and the Ming Dynasty was in turmoil. No one knows whether Emperor Chongzhen read this book. What is known is that in the past seven or eight years, the Daming Firearms Factory has There has been no improvement in the matchlock gun, and even the backward three-eyed gun has been continuously produced.