Title: Gang kou hang dao gong cheng dao lun
Description: Ben shu gong 6 zhang,Nei rong bao kuo:gang kou shui yu yu shui gong jian zhu wu,He gang ji nei he hang dao gong cheng,Gang kou hang dao gong cheng xiang mu guan li yu fa lü fa gui,Gang gong ji shu shi wu,Zhong wai gang kou ji gang gong ji shu fa zhan deng.
Subjects: Jiao cai, Hang dao gong cheng, Gang kou gong cheng, Gao deng jiao yu