Literature Reference: 豹虎关西卒，金汤渭北城。—— 《和渭北刘大夫借便秋遮虏寄朝中亲友》 Leopard and tiger warriors of Guanxi, and the impregnable city of Weibei. Source from 'He Weibei Liu Dafu Jie Bian Qiu Zhelu Ji Chaozhong Qinyou'.
豹: A mammal, resembling a tiger but smaller in size.
虎: Resembling a majestic and awe-inspiring appearance, exuding an aura of power and valor.
Meaning: Leopard and tiger symbolize bravery, strength, and dignity, often used to describe valiant warriors or a powerful army.