9个数字有多少种组合密码呢

简介：Historically, Feng Yuanbiao died of illness in the first year of Hongguang, which was the year after the 17th year of Chongzhen. However, he experienced too much in his tenure as Minister of the Ministry of War, especially Wu Luyou, whom he valued most, died in Huguang. It was a heavy blow to him. Faced with the internal and external situation, especially the chaos in Huguang, he was finally exhausted mentally and physically and could no longer support it.