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. It was dredged by Su Dongpo, a great poet in the Northern Song Dynasty, when he was the magistrate of Hangzhou. Later generations named Su Di to commemorate her achievements in managing the West Lake. The waves lying on the long embankment connect the north and south mountains, adding a charming scenery to the West Lake. In the Southern Song Dynasty, Xiao Chun, Su Causeway was listed as the first of the ten scenic spots in the West Lake, and in the Yuan Dynasty, it was also called "Liuqiao Willow" and was listed as the ten scenic spots in Qiantang, which shows that she has been deeply loved by people since ancient times.
The six arch bridges on the Su Causeway are named InBev, Suolan, Wangshan, Dike, Dongpu and Yuehong from south to north.
Bai Causeway was originally named "Baishadi". Across the East and West Lake, starting from the Broken Bridge, crossing the Golden Belt Bridge and ending at Pinghu Qiuyue, with a total length of 1 km.
Bai Juyi, a great poet in the Tang Dynasty, often wandered around Bai Causeway when he was a secretariat in Hangzhou. He once wrote a poem "A Spring Tour in Qiantang", saying, "I love the lack of travel to the east of the lake, and the green poplar falls under the white sand embankment." When Bai Juyi governed Hangzhou, he built water conservancy projects, built stone culverts, dredged six wells and opened up the West Lake. His achievements are obvious, and he is very moral to the people. Later generations are full of nostalgia for this wise local official, calling Baisha Land Bai Causeway. However, Bai Juyi's Baigong Dike is not the present Bai Causeway, but a dike extending from Qiantangmen to the northeast, which has long been abandoned, and now only the remains of Tangshengmen Bridge Pavilion are left.