3000 yuan per mu. From 20 14, according to the principle of "whoever exceeds the standard, who compensates, who meets the standard, who benefits", Jiangsu Province took the lead in establishing a two-way compensation mechanism for water environment in China, that is, when the water quality of the compensation section is worse than the water quality target, the upstream area compensates the downstream area, and when the water quality of the compensation section reaches the water quality target, the downstream area compensates the upstream area. In 2023, the compensation standard for returning farmland to lakes in gaoyou lake is 3,000 yuan per mu.