Is it better to work the day shift or the night shift in the hotel?

Okay, day shift. The day shift in the hotel is normal and will not cause harm to the body. Night shift in hotel leads to the decrease of melatonin secretion which inhibits tumor production. The night shift disrupts the normal biological clock of the human body, but it should be working when sleeping. However, melatonin, which can inhibit tumor production in human body, is usually secreted at night, and light will inhibit melatonin secretion.