Literature Reference: 草没章台阯，隄横楚泽湄。—— 《酬翰林白学士代书一百韵》 Grass overgrown the ruins of Zhang Terrace, while the dike stretches across the marshes of Chu. Source from 'A Response to Bai Juyi's One Hundred Rhymes'.
隄: Synonymous with "dike" or "embankment".
横: Horizontal or vertical, it's all the same. Opposed to "longitudinal."
Meaning: The dike stretching across the marsh symbolizes stability and protection.