wén        jī          qǐ         wǔ

闻        鸡       起        舞

       Rise up upon hearing the crow of a rooster and practice with the sword.It metaphors those people who want to serve the country in time to rise.

eg.南宋的民族英雄岳飞年轻的时候就闻鸡起舞，立志要保卫国家。

       Yue Fei, the national hero in Southern Song Dynasty, rose up upon hearing the crow of a rooster and practiced with the sword and determined to safeguard his country since youth.