Usually, a month of daily sunbathing on the back can have a more obvious effect. But because each person’s physique is different, so the back of the sun to supplement the effect of Yang Qi time also varies. Chinese medicine believes that the back is Yang, wind and cold evil into the body will lead to Yang injury, old and weak people are prone to recurrence of old diseases, aggravating the disease. The back of the sun can effectively help the body absorb nature’s Yang Qi, so that it can be transformed into its own Yang Qi, thus improving the cold hands and feet, spleen and stomach cold, indigestion and other phenomena that patients with Yang Qi weakness or Qi and blood deficiency tend to appear. It is recommended that sunbathing be done at around ten o’clock in the morning, and depending on one’s physique, young people can sunbathe for about two hours, while middle-aged and elderly people should sunbathe for half an hour. In addition, every night with hot water soak feet for about 30 minutes, because the human foot acupuncture points more, can help stimulate the body’s Yang Qi. If necessary, you can also take Chinese moxibustion treatment, also has a good effect of Yang Qi.