Literature Reference: 膺宝图，执左契。—— 《郊庙歌辞 梁郊祀乐章 庆和 四》 Holding the treasure map, grasping the covenant. Source from 'Jiao Miao Ge Ci Liang Jiao Si Yue Zhang Qing He Si'.
左: Assistance, a term denoting direction and position.
契: Contract. Deed. Metaphorically, it signifies a harmonious bond of friendship, cherished and esteemed by all, conducive to fostering widespread goodwill and virtuous connections.
Meaning: The left covenant symbolizes contract and responsibility, embodying the spirit of integrity and commitment.