Guiding opinions:

There are two periods of the day that are most suitable for sunbathing. The first section is from 6 am to 10. At this time, the infrared ray is at the peak, and the ultraviolet ray is low, which makes people feel warm and soft, and can play the role of promoting blood circulation and removing blood stasis. The second stage is at 4-5 pm, when the A-beam of ultraviolet rays is prevalent, which can promote the absorption of calcium and phosphorus in the intestine, help to enhance physical fitness and promote normal calcification of bones. No matter what season it is, it is forbidden to stay in the sun for a long time between 10 and 4: 00 pm, especially between 12 and 4: 00 pm, because the ultraviolet rays in the sun are R and B beams at this time, which will cause harm to the skin. In addition, from the measurement concept, staying in the sun for not less than 30-60 minutes every day can balance yin and yang. It's best to wear red clothes when basking in the sun, and then choose white clothes instead of black.