What do you mean Su Causeway is accompanied by beautiful women?

Liu Xia, Chi Pan, by the river, beauty accompanies the West Lake Long Beach. "On the banks of the Yangliu River, there are beautiful women like clouds in Su Causeway." It's about Jiangsu. Su Causeway starts from Nanping Mountain in the south and ends at Qixia Mountain in the north, with a total length of nearly three kilometers. Su Dongpo, a great writer and calligrapher in the Northern Song Dynasty, dredged the West Lake and used the dredged mud when he was the magistrate of Hangzhou.