初生之犊不畏虎

Explanation: Young people see the world not as deep as metaphor say Gangan, fearless. 　　Source: Yao Xueyin "Rereading," Volume XIV: "just after breakfast, all troops exchange of Qi, some shock at the Wal-off Chuang Wang and Li, can not help but be dismayed, but some people seem to kid afraid of tigers, grinding rub palm to wait fist fight. " 　　Examples: I see you two, there was ~! ★ opera "Search College"