Core Points - The article highlights the historical significance of the "Song Gong Monument" located in the New Fourth Army Memorial Hall in Yancheng, Jiangsu, which commemorates the construction of the Song Gong Dyke during a devastating tsunami in 1939 [2][4] - The dyke, built under the leadership of Song Naide and the New Fourth Army, played a crucial role in protecting local residents from natural disasters and is recognized as a significant water conservancy project [4][5] Summary by Sections Historical Context - Yancheng, located near the Yellow Sea, faced severe natural disasters, including a major tsunami in August 1939 that resulted in over 13,000 deaths [2] - The local Communist Party and the New Fourth Army took action to protect the community by constructing the dyke [2][3] Construction of the Dyke - The construction of the dyke began on May 15, 1941, with the involvement of New Fourth Army soldiers and local residents, overcoming significant challenges including adverse weather and enemy sabotage [3][4] - The dyke, measuring nearly 45 kilometers in length, 3 meters in height, and 19 meters in width, was completed on July 31, 1941, and successfully withstood a subsequent tsunami [4] Recognition and Legacy - The Song Gong Dyke is celebrated as a model of early water conservancy efforts led by the Communist Party and has been included in provincial and national heritage lists [4][5] - The New Fourth Army's efforts in building the dyke fostered strong community support and affection, symbolizing the bond between the Party and the people [4]