Bai Juyi
As governor of Hangzhou, Bai Juyi realized that the farmland nearby depended on the water of West Lake, but, due to the negligence of previous governors, the old dike had collapsed and the lake had dried out to the point that the local farmers were suffering from severe drought. He ordered the construction of a stronger and taller dike, with a dam to control the flow of water, thus providing water for irrigation, relieving the drought, and improving the livelihood of the local people over the following years. Bai Juyi used his leisure time to enjoy the beauty of West Lake, visiting the lake almost every day. He ordered the construction of a causeway to allow walking on foot, instead of requiring the services of a boat. A causeway in the West Lake (Baisha Causeway, 白沙堤) was later referred to as Bai Causeway in Bai Juyi's honor, but the original causeway built by Bai Juyi named Baigong Causeway () no longer exists.