青过于蓝

Explanation: Green extracted from the Blue Grass, but a deeper color than blue grass. Metaphor students than teachers, or future generations than their predecessors. With "excel." 　　Source: Song Xi "A quarter gram Lu book": "they write books is that, if the" original saying "who is described as blue-green men too." Hu Tsai Song "Tiaoxi oun Cong, then later _set_ the valley below": " Xu Hao Su cover school books, Shen Chuan school teacher valley cover book, those who are young are too blue. " Thesaurus:  surpass one’ s master or teacher in learning, a coming man, Slightly more astute, be one up (on sb.), Chat the edge, Qi Gao tempo, Last The show, s master or teacher in learning and Ahead blueness, Green in Blue, Online games it a coming man Antonym Group:  above (beyond) one's reach, Elusive, Elusive, Catch up