The explanation of Tiangui (1), that is, Yuan Yin and kidney essence. A substance that promotes reproductive function. Deck, the five elements belong to *. "Su Wen On Ancient Naivety": "At the age of seven, a woman is full of kidney qi, and her teeth are longer. At the age of twenty-seven, her days are coming, her pulse is passing, her pulse is too strong, and the moon is in the present, so she has a son." "Su Wen, Ancient Naive Theory": "The husband is eight years old, with strong kidney qi, long teeth, full kidney qi, full of heaven, full of essence, and harmonious yin and yang, so he can have children." (2). Specifically refers to women's menstruation. In Song and Wu Dynasties, "Notes on the Tale of Can Change Zhai II" once wrote: "I was also stationed in the field, and my wife, a doctor in the field, was forty years old, but she was not old enough. When I checked her pulse, I said,' Serum will die next year.' If you die, you die. "Qing He Bange's" Pear Blossom in the Night Tan ":"The strange bottom is like a virgin! And ten * years old, the day has not arrived. If this is the case today, what is the doubt! " The explanation of the word decomposition day is high above the ground: the sky. Sky. Plough (Big Dipper). Tianyuan (heaven and abyss, metaphorically different). Be unconstrained and unconstrained. On top: the top of the sky (the blank above the page). Climate: weather. It is cold. Season, season: winter. The explanation of day and one decyl refers to menstruation. The tenth place of heavenly stems is used as a substitute for the tenth place in order. Radical: Yuan.