Introduction to Ruan Di: At the end of the eighth year of the Republic of China (1919), Tang Jiyao renovated the east and west embankments of Cuihu Lake and built his family's "Double Festival Square" at both ends of the embankments. The "Weidong" iron bridge is built on the east side of the embankment, and the "Dingxi" stone bridge is built on the west side of the embankment. This east-west embankment intersects with the north-south embankment at the island in the middle of the lake. Yuan Jiagu's poem "On the Green Lake Embankment": "The trees on the left and right meet the Green City Cave, and the shallow and deep water swells into the green pool. The two embankments are like a sea of cars and horses, allowing me to look for small poems beside the flowers."