The Ke Ling factory in Zhangjiakou has to change shifts every few days.

Every two weeks, once a week. According to the boss direct employment website, the Ke Ling factory in Zhangjiakou has two shifts every two weeks. In order to pursue the efficiency of the factory, many migrant workers are most afraid of day shift and night shift. Working at night will be very tiring and harmful to their health. Many people come into the factory, and they all look like teenagers and twenties.