Therefore, building dikes to accumulate lake water for irrigation and reducing the harm caused by drought, and making stone carving records of Qiantang Lake, and carving the policies, methods and matters needing attention of lake water management on the lakeside for future generations to know, have a great influence on lake water management in Hangzhou later.
Before Bai Juyi left office, he left an official salary in the state treasury as a fund for the turnover of official salaries in Hangzhou, and then made up the original value afterwards.
Extended data:
The West Lake has Bai Causeway, and willows are planted on both sides. Later generations mistakenly thought that this was a levee built by Bai Juyi and called it Baigong Dike. In fact, this "Bai Causeway" existed before Bai Juyi came to Hangzhou. At that time, it was called "Baishadi" and it was in Bai Juyi's poems.
When Bai Juyi was in Hangzhou, Yuan Zhen was also transferred from the prime minister to an observer in eastern Zhejiang, which was not far from Hangzhou, so he gave them many poems. When Bai Juyi left Hangzhou, Yuan Zhen asked Bai Juyi to hand over all his works and compile them into 50 volumes of Bai Juyi's Changqing Collection.