石烂江枯

Explanation: Until the stones become soil, the river dried up. Analogy can not happen. 　　Source: "Ming Shi Yunnan Chieftain Lu Chuan Chuan II" [Wang Ji] is and thinking about Paul, the Ministry of Xu Le Zhuman soil was present, ranking as before Meng Yang, Li Shi Jinsha River as the boundary, the oath reads' dry stone Black River, Seoul trusted by ferry. '"