阳欲化阴出玉沟，火轮忙驾莫停留。
巽风吹上红元府，斩断赤经永不流。
阳欲化阴，是信至犹未经行之时，急忙鼓动巽风驾起火轮，从丹田运上红元府以斩之。
《太阴炼形法》曰∶初下手时，闭目存神，大休息一场，使心静息调，而后凝神入气穴；将两手
交叉捧乳，轻轻柔摩三百六十遍；将气自下丹田，微微吸起二十四口；仍用手捧乳，返照调息，久久
自然真息往来，一开一合，养成鄞鄂。神气充足，真阳自旺，其经水自绝，乳缩如男子，是谓斩赤龙。
如此久久行持后，不必捧乳吸气，只凝神于气穴，回光返照，是为玄牝之门也。真息悠悠，
虚极静笃，阳气薰蒸，河车逆转。万朵紫云朝玉宇，千条百脉种泥丸。斩赤龙之功，有如此效验，故
女子修炼，以斩赤龙为要也。
杀人无过此妖精，七七数周命遂倾。
炼到太阴形隐后，安排紫府庆长生。
许祖云∶“男子修成不漏精，女子修成不漏经。”盖女子之经，为生人之始信，返经成气，则乳缩
如男子，而经自不漏。若男子，则炼精化气，阴根缩如童子，而精自不漏。不漏而后命可延。若不斩此妖
精，到七七四十九岁，血枯经尽，无生机矣。生机绝则命倾。
《上药灵镜三命篇》曰∶“女子以血为肾，乃空窍焉。过四十九岁，腰干血涸，无生机矣。养而久之，
又生血元似处子焉。此又无中生有之妙也，见而有之，一斩即化，而命生矣。”
如何养之使复生血元？亦不过收心养性，养气凝神而已。不二元君曰∶“本是无为始，何期落后天，
一声才退场门，三寸已司权，况披尘劳扰，那堪疾病
缠，子肥能益母，休道不回旋。”别有补功，未敢轻泄，即孙不二所谓“缚虎归真穴，牵龙斩益丹”之
谓也。女子修到经不漏，其后性命功夫与男子之功大同小异。患无人以诀破其奥妙耳。
When Yang Qi desires to transform into Yin Blood and exit through the Yugou (female reproductive tract outlet), one must hastily drive the Fire Wheel (the movement of intent and Qi in internal alchemy) without lingering.
The Xun Wind (breath) blows upward to the Hongyuan Fu (area around the Danzhong acupoint in the chest), severing the Red Menses (menstruation) so it never flows again.
"Yang Qi desiring to transform into Yin" refers to the time when menstruation is about to arrive but has not yet begun; at this moment, one should hastily stir the Xun Wind and drive the Fire Wheel, transporting from the Dantian to the Hongyuan Fu to sever it.
The *Taiyin Lianxing Fa* states: At the initial stage of practice, close the eyes and visualize the Primordial Spirit, taking a deep rest to calm the mind and regulate the breath, then condense the Shen (Spirit) into the Qi Acupoint; cross both hands to hold the breasts, gently and softly massaging them three hundred and sixty times; draw the Qi up slightly from the Lower Dantian twenty-four times; continue holding the breasts with hands, reflecting inwardly to regulate the breath, and over time, the True Breath will naturally come and go, opening and closing once, cultivating the state of Yine (fullness of True Qi). When Shen and Qi are sufficient, True Yang naturally prospers, menstruation naturally ceases, breasts shrink like those of a man, which is called "Severing the Red Dragon."
After practicing thus for a long time, there is no need to hold the breasts or inhale Qi; simply condense the Shen into the Qi Acupoint and reflect the light inwardly; this is the Gate of Xuanpin (Mysterious Female). The True Breath is leisurely, reaching the state of extreme emptiness and stillness, Yang Qi steams and warms, and the Heche (River Cart) reverses direction (essence and Qi ascend along the Du Meridian). Ten thousand purple clouds face the Yuyu (Niwang Palace in the head), a thousand and hundred meridians gather at Niwan. The merit of Severing the Red Dragon yields such effects; therefore, for women's cultivation, Severing the Red Dragon is essential.
There is no demon more harmful to life than this; when the cycle of seven sevens (forty-nine years) is complete, life will collapse.
After cultivating until the Taiyin (female physiological characteristics) form is hidden, arrange for the Zifu (Niwang Palace in the brain) to celebrate longevity.
Master Xu said: "Men cultivate to prevent leakage of Jing (Essence); women cultivate to prevent leakage of Jing (menses)." Generally, a woman's menses is the initial sign of human generation; returning menses to transform into Qi causes the breasts to shrink like a man's, and menses naturally cease leaking. For men, it is refining Jing to transform into Qi, causing the genital root to shrink like that of a child, and Jing naturally ceases leaking. Only by not leaking can lifespan be extended. If this demon is not severed, upon reaching forty-nine years (seven sevens), blood dries up, menses exhausts, and there is no vitality. Once vitality is cut off, life collapses.
The *Shangyao Lingjing Sanming Pian* states: "Women regard Blood as Kidney, which is an empty cavity. After forty-nine years, the waist becomes dry and blood is exhausted, leaving no vitality. Nourish it and let it last long, and Blood Yuan (Primordial Blood) will regenerate like that of a maiden. This is the wonder of producing something from nothing; seeing it and having it, one severance transforms it, and life is generated."
How to nourish it to regenerate Blood Yuan? It is nothing more than gathering the heart to nurture nature, nurturing Qi and condensing Shen. Bu'er Yuanjun said: "Originally it was the beginning of Wuwei (Non-action), why expect to fall behind into the Post-Heaven state? With one sound, one retreats from the gate of the field; within three inches (Dantian), authority is already held. Moreover, wearing the disturbances of worldly labor, how can one endure entanglement by diseases? A fat child benefits the mother; do not say it cannot turn back." There is another supplementary method, which I dare not lightly reveal; it refers to what Sun Buer said: "Bind the Tiger back to the True Acupoint, lead the Dragon to sever and benefit the Dan." When women cultivate until menses does not leak, their subsequent work on Xing (Nature/Life) and Ming (Life/Essence) is largely similar to that of men. It is merely that few people exist to break open its mysteries.