Literature Reference: 赤壁浮春暮，姑苏落海边。—— 《奉送苏州李二十五长史丈之任》 In the dusk of spring at Chibi, Gusu lies by the sea. Source from 'Feng Song Suzhou Li Er Shi Wu Zhang Shi Zhang Zhi Ren'.
姑:
苏: Alleviate, relieve.
Meaning: Gusu, the ancient name of Suzhou, symbolizes the beauty and prosperity of the Jiangnan water town.