Core Viewpoint - The ancient irrigation system along the Yongding River in Beijing, consisting of five ancient canals, has been modernized and continues to play a crucial role in agricultural development and water management in the region, recently recognized as a World Irrigation Heritage site [13]. Group 1: Historical Context - The Yongding River has a history of flooding, prompting local residents to construct five ancient canals to manage water flow and irrigation [1]. - The irrigation system includes the ancient canals of Fujia Tai, Dingjia Tan, Gongyi Gully, Sanjiadian, and Chenglong, which have been preserved and modernized over time [13][27]. Group 2: Agricultural Impact - Fujia Tai village has seen a significant increase in apple production, with larger fruit sizes and higher yields attributed to the irrigation provided by the ancient canal [14][16]. - The village now has over 500 acres of orchards benefiting from the ancient irrigation system, with farmers earning substantial incomes from high-value crops [16]. Group 3: Modern Developments - The ancient canals have undergone modernization, including the construction of concrete structures and regular maintenance to ensure their functionality [16][19]. - The Chenglong canal is being upgraded to enhance water supply to five rivers in the region, aiming to improve water resource management [23]. Group 4: Cultural Significance - The irrigation heritage is intertwined with local culture, as seen in the continuation of the Yongding River Culture Festival, which promotes water culture and local traditions [27]. - The ancient canals and associated structures are recognized as important cultural and historical assets, contributing to the region's identity and agricultural practices [26].