Three flowers gather at the top, a term in inner alchemy. In ancient times, "flower" and "hua" were related, and "hua" was the original character of "flower", so "three flowers" were "three flowers", which represented the glory of the human body's essence and spirit. The so-called "gathering at the top" means that the essence, energy and spirit are mixed together and gathered in one orifice of the entrance. Xiao Tingzhi's "Golden Elixir Dacheng Collection" said: "Ask about the gathering of three flowers on the top. The answer is: the spirit and energy are mixed into one. The one orifice in the entrance is the acupoint of the spirit and essence." The "top" here has a special meaning. It means "the inner courtyard of the Heavenly Palace". The so-called "Tiangong" refers to the brain, and the "inner courtyard" is the space inside the brain with the vertical line between Yintang point and Baihuixue as the center point. "Three Flowers Gathering at the Top" is a superior state of inner alchemy. The emergence of this state must go through a step-by-step process of cultivation. Ancient Taoist alchemists were afraid of leaking the secrets of heaven and were worried that the great truth would be lost, so they expressed it in implicit symbolic ways. Therefore, the name "Three Flowers" has many transformed forms. In essence, the intrinsic meaning of "Three Flowers" is "Three Yangs". The so-called "three yangs" are the yang within yin, the yang within yang, and the yang within yin and yang. The theory of "Three Yangs" comes from the transformation of the five elements and the heavenly stems. In ancient China, "water" represents the north, and the heavenly stem is Rengui, which corresponds to the kidneys in the human body; "fire" represents the south, and the heavenly stem is Bingding, which corresponds to the heart in the human body; gold represents the west, It is Geng and Xin in the heavenly stem, and corresponds to the lungs in the human body. The kidneys govern essence, the heart governs spirit, and the lungs govern qi. Water is in the yin direction in the north, and the corresponding heavenly stems are Ren and Gui, one yin and one yang. Ren is yang and Gui is yin. The so-called "Yang in Yin" refers to the "Ren" representing the two celestial stems in the north; Fire In the south, it is the yang side, and the corresponding heavenly stem Bing and Ding are also one yin and one yang. Bing is yang and Ding is yin. The so-called "yang in yang" refers to the C among the two Bing and Ding in the south; gold is yin in the west. Fang, corresponding to the lungs, expels the old and brings in the new, connecting the inside and the outside, so it has the nature of yin and yang transformation. The so-called "yang of yin and yang" refers to the "geng" in the heavenly stem, gengxin, which represents the west and the lungs. In the science of inner alchemy, "refining essence and transforming qi" means removing the guine in kidney water, and ascending to ren; "refining qi and transforming spirit" means removing the pungent in lung metal, and ascending to geng; "refining spirit and returning to emptiness" means removing the heart. Ding in the fire rises to C. Ren, Geng and Bing symbolize the "three yangs" in the essence and spirit. They sublimate after entering the fire, and finally gather in the Niwan Palace. This is called "Three Flowers Gathering on the Top". The top is the tripod. To revolutionize the old and make a new one, to be reborn, one will reach the realm of sage and enlightenment. When reaching such a realm, the body will be glorious and radiant. At this time, the essence, energy and spirit have returned from the state of separation to the state of "integration", as if pieces of golden flowers appear in the sky. This is the beautiful result of internal strength, so "flower" is also "hua".
As for the second question, that is the background setting of the novel. No one knows why, haha.