Why is a small Sunday always a cool feeling?

After the small Sunday, the human body is in balance of yin and yang, and naturally feels very comfortable.

The internal qi of "Qi passing through Ren Du" will circulate repeatedly along Ren Du's two veins, such as flowing endlessly, which is the "Zhou Xiaotian Gong" in Qigong. At this time, a bright light often appears at the Tang Yin point and runs with it, just like a meteor. From then on, Zhou Tianqi had no symptoms of getting angry or being afraid of cold. Physical and mental happiness is indescribable, just like what Gan Kun and Huang Ting call coitus.