The article discusses the history and future of agricultural water supply in North China. Over the years, the region has shifted from using surface water for irrigation to relying more on groundwater due to urbanization and industrialization. However, groundwater resources are becoming limited, leading to water scarcity. To address this, the researchers suggest adjusting crop types, using water-saving techniques, and exploring alternative water sources like brackish groundwater and wastewater for irrigation. The goal is to improve water efficiency in agriculture and ensure sustainable water supply for the future.