Napping generally has the benefits of improving work efficiency, protecting the eyes, protecting the heart and so on. 1. Improve work efficiency: napping can make the body and brain rest, afternoon mind will be more awake, work efficiency will be improved. 2. Protect the eyes: nap can promote the secretion of the tear glands, moisturize the dry eyeballs, so that the eyes can get a good relaxation, to avoid persistent overuse of eyes caused by vision loss. 3. Protect the heart: High pressure work can easily lead to the body and the heart is in a state of tension, resulting in a load on the heart. Appropriate napping can effectively relieve fatigue, so that the heart consumes less. It is recommended that the nap time as far as possible to control in half an hour or so, nap time is too long will affect the normal sleep at night.