Why are there so many stevedores in Weihai?

Many fishing boat workers and stevedores are recruited in Weihai, because it is close to the dock, so there are many.

Weihai is a municipality under the jurisdiction of Shandong Province, located in the east of China and at the eastern end of Shandong Peninsula. It is bordered by the Yellow Sea in the north, east and south, Liaodong Peninsula in the north, Korea Peninsula across the sea in the east and Yantai in Shandong in the west.