Literature Reference: 肃肃兔罝，椓之丁丁。赳赳武夫，公侯干城。肃肃兔罝，施于中逵。赳赳武夫，公侯好仇。肃肃免罝，施于中林。赳赳武夫，公侯腹心。—— 《诗经·国风·周南·兔罝》 Solemn are the rabbit nets, their stakes driven firmly. Valiant warriors, they are the bulwark of the lords. Solemn are the rabbit nets, spread in the crossroads. Valiant warriors, they are the companions of the lords. Solemn are the rabbit nets, spread in the forest. Valiant warriors, they are the trusted hearts of the lords. Source from 'The Book of Songs'.