Title: Du li chuang ye zhi nan
Description: Ben shu zhu yao jiang shu le zhong da jue ding,Yan jiu he fa zhan bu,Shi chang ying xiao bu,Gong gong shi wu bu,Guang gao bu he kai ye dian li,Jian li ren ji guan xi wang deng nei rong.
Subjects: Qi ye guan li