弄斧班门

Explanation: Luban brandish axes in the front. Analogy to show off in front of expert skills, himself. 　　Source: Tangliu Zong Yuan "Wang par sing Preface": "Cao ax in the class, Ying door, the Sri Lankan ie succeeded ears. Ouyang Xiu Song" and Mei Yu Holy Book ":" Yesterday in the true _set_ting, a poem seventy-eight, to this record, expert, funny funny. " 　　Examples: Niche jotted twelve, ~, Hugh laugh off laugh. (Ming Gao Lian, "The Jade Hairpin get sent")