喜逐颜开

Explanation: By follow; Yan face, face. Describe the very joy, smiling. 　　Source: Qing Wu Jingzi "Scholars" said the seventh back to school after reading, feel happy to open by Yan day worries are gone. " 　　Examples: School Road, after reading, feel - a day not a worry. (Qing Wu Jingzi "Scholars" seventh back)