Why do stevedores in Qingdao Port keep recruiting people?

Wages are too low, resulting in a shortage of workers. The stevedores in Qingdao Port are the most needed workers in Qingdao Port, but the wages of the stevedores in Qingdao Port are lower than those in other ports in China 1.200 yuan, which leads many workers to choose job-hopping. Qingdao port has been recruiting people because of lack of work.