Introduction to Yangkou Outer Lock: The first lock in the South Yellow Sea - Yangkou Outer Lock is the busiest and unique scenery in the scenic area. A ship is neatly lined up here waiting to enter and exit, which has a great impact on Rudong's agriculture, fishery and economy. Development brings huge benefits. It is the sea gate with the largest scale, the most complete functions and the highest degree of automation along the coast of Jiangsu that integrates shipping, waterlogging and tide blocking.