Ben shu rong gua le dang qian guo nei wai gong gong guan xi xue de zui xin yan jiu cheng guo, fan ying le zheng ge 20 shi ji 90 nian dai gong gong guan xi shi jian de yan ge he fa zhan. dui gong guan shi wu de chan shu geng shi nu li nang gua le guo ji guo nei zui xin, zui ling de fang fa he shou duan.