积素累旧

Explanation: Refers to the years of exchanges. 　　Source: Han Wang Bao "morals of four sons": "Xi Ning Qi commercial song to dry Qihuan; more negative Chu Shi, and Yan Ying http: Non a tired old plot elements of joy, are met and that the death Gou Tu loved ones also. " 　　Examples: Suddenly, meditation, memory Panyu Candidates Liu Wenxiu, the United States Manners junior, and justice is very high, and students have ~ the joy. ★ shu "burning sword of mind"