饮食之类，人之脏腑各有所宜，似不必过为拘执，惟酒为不宜。盖胎种先天之气，极宜清楚，极宜充实，而
酒性淫热，非惟乱性，亦且乱精。精为酒乱，则湿热其半，真精其半耳。精不充实，则胎元不固；精多湿热，则他
日痘疹，惊风、脾败之患率已基于此矣。故求嗣者必严戒之。与其多饮不如少饮，与其少饮尤不如不饮，此胎
元之大机也。若醉后入房，精荡而随薄矣。
经曰∶精不足者补之以味。然肥浓之味不能生精，惟淡泊之味乃能补精耳。夫万物皆有真味调和，胜则真
味失。不论荤素，蒸煮得法自有一种冲和恬淡之气，食之自能养精。盖食物甚多，惟五谷为得五味之正，故煮
粥饭熟后，上面有浓汁融成一团者，皆米之精液所聚也，食之骤能生精，试之有效。人能行是数者，非特为求
嗣之良方，亦可为摄生之妙术矣。
炼精全在肾家下手，内肾一窍名元关，外肾一窍名牝户。真精未泄，干体未破，则外肾阳气至子时而兴，
人身之气与天地之气相应。精泄体破，而人身阳生之候渐迟，有迟至丑，迟至寅，且有迟至卯而始生者，更有
终不生者，始与天地不应矣。炼之之诀，须于夜半子时披衣起坐，两手搓极热，一手将外肾兜住，一手掩脐心
而凝神于内肾，久久行之而精旺矣。
君火在心，心其君主也；相火在肾，肾其根本也。然二火相因无声不应，故心宜静，不静则火由欲动。
而自心挑肾，先心后肾者，以阳烁阴出乎勉强，勉强则气降而丹田失守已，失元阳之大本。肾宜足，肾足则
阳从地起，而由肾及心，先肾后心者，以水济火本乎自然，自然则气升而百脉齐到，斯诚化育之真机。故轻
薄之夫每从勉强，故多犯虚劳，
不利子嗣。忠浓之士常由自然，故品物咸享，何患后人。求嗣者，亦务阳道之真机则得矣。
饮食方面，人体的脏腑各有适宜的食物，似乎不必过分拘泥执着，只有酒是不适宜的。因为孕育胎种所需的先天之气，极其需要清朗纯净，也极其需要充实饱满，而酒的性质淫荡且热，不仅会扰乱心神，也会扰乱精液。如果精液被酒所乱，那么其中一半是湿热，一半才是真精。精液不充实，胎元就不稳固；精液中湿热过多，日后出现痘疹、惊风、脾败等祸患大多已经基于此了。所以求子的人必须严格戒酒。与其多喝不如少喝，与其少喝更不如不喝，这是关乎胎元的大关键。如果在醉酒后行房事，精液就会涣散而变得稀薄。
经文说：“精气不足的人，要用有滋味的食物来补。”然而肥厚浓烈的食物不能生精，只有清淡的食物才能补精。万物都有本真的味道，如果烹饪过度，本真的味道就失去了。不论荤素，只要蒸煮得法，自然有一种冲和恬淡的气息，吃了自然能养精。大概食物很多，只有五谷才符合五味的正道，所以煮粥饭熟后，上面有一层浓汁融成一团的东西，都是米的精液聚集之处，吃了能迅速生精，尝试过确实有效。人如果能践行这几条，不仅是求子的良方，也可以作为养生的妙术。
炼精全在于肾脏下手，内肾的一个窍穴名叫元关，外肾的一个窍穴名叫牝户。真精未泄，身体元气未破，那么外肾的阳气在子时（夜间11点至凌晨1点）就会兴起，人身的气与天地的气相应。精液已泄，身体元气已破，那么人身阳气生发的时机逐渐推迟，有的推迟到丑时（凌晨1点至3点），有的推迟到寅时（凌晨3点至5点），甚至有推迟到卯时（清晨5点至7点）才开始生发的，更有最终不再生发的，这就开始与天地之气不相呼应了。炼精的要诀，必须在夜半子时披衣坐起，双手搓至极热，一只手托住外肾，另一只手捂住肚脐中心，将神念凝聚在内肾，长久坚持执行，精液就会旺盛。
君火位于心，心是君主之官；相火位于肾，肾是根本之脏。然而这两把火相互依存，如同声与响应的关系，所以心宜保持安静，如果不静，火就会因欲望而动。那些先由心动去挑动肾，先用心后及肾的人，是以阳热煎熬阴精出于勉强，勉强则气机下降而丹田失守，丧失了元阳的根本。肾宜充足，肾足则阳气从地而起，由肾传至心，先补肾后养心的人，是以水济火，本乎自然，自然则气机上升而百脉通畅，这确实是化育生命的真正机理。所以轻薄之人往往出于勉强，因此多患虚劳病，不利于生育后代。忠厚之士常由自然之道行事，因此万物皆能享受其福泽，何必担心没有后人。求子的人，务必探求阳道运作的真正机理就可以了。
In terms of diet, the organs and bowels of the human body each have their suitable foods, and one need not be overly rigid or dogmatic about them; however, alcohol is unsuitable. This is because the *xiantian zhi qi* (Pre-natal Qi) required for conception needs to be extremely clear and pure, and extremely substantial. The nature of alcohol is licentious and hot; it not only disturbs the mind (*Shen*) but also disrupts the essence (*Jing*). If the essence is disrupted by alcohol, half of it becomes damp-heat, leaving only half as true essence. If the essence is not substantial, the fetal foundation (*Taiyuan*) will not be secure; if there is excessive damp-heat in the essence, future ailments such as smallpox/measles (*Douzhen*), convulsive disorders (*Jingfeng*), and spleen failure are likely already rooted in this condition. Therefore, those seeking offspring must strictly abstain from alcohol. It is better to drink less than to drink more, and even better to abstain completely; this is the major mechanism concerning the fetal foundation. If intercourse occurs while drunk, the essence becomes scattered and thin.
The Classic states: "For those with insufficient Essence, replenish it with flavors." However, rich and heavy flavors cannot generate Essence; only bland flavors can tonify Essence. All things possess a true flavor, but if overcooked, this true flavor is lost. Regardless of whether meat or vegetables, if steamed or boiled properly, they naturally possess a mild, harmonious, and tranquil quality, which nourishes the Essence when consumed. Among the many foods, only the five grains truly embody the correct balance of the five flavors. Thus, after cooking porridge or rice, the thick liquid that condenses into a mass on the surface is the accumulation of the grain's essence. Consuming it can rapidly generate Essence, and trials have proven effective. If one practices these methods, it serves not only as an excellent prescription for conceiving but also as a wonderful technique for health preservation.
Refining Essence relies entirely on working at the level of the Kidney system. The internal opening of the Kidney is called *Yuanguan*, and the external opening is called *Pinhu*. When true Essence has not been leaked and the physical constitution has not been broken, the Yang Qi of the external genitalia rises at *Zishi* (the Rat hour, 11 PM–1 AM), aligning the Qi of the human body with the Qi of Heaven and Earth. Once Essence is leaked and the constitution broken, the timing of Yang Qi generation in the body gradually delays—sometimes until *Choushi* (Ox hour, 1 AM–3 AM), *Yinshi* (Tiger hour, 3 AM–5 AM), or even *Maoshi* (Rabbit hour, 5 AM–7 AM); some never generate it again, thereby losing alignment with Heaven and Earth. The secret to refining Essence is to get up and sit dressed at midnight (*Zishi*), rub hands until extremely hot, use one hand to support the external genitalia, and use the other hand to cover the center of the navel, focusing the spirit (*Shen*) within the internal Kidney. Practicing this for a long time will make the Essence robust.
The Ministerial Fire (*Junhuo*) resides in the Heart, which is the Sovereign organ; the Ministerial Fire (*Xianghuo*) resides in the Kidney, which is the root organ. However, these two fires are interdependent, like sound and echo. Therefore, the Heart should remain tranquil; if not tranquil, Fire moves due to desire. Those who first stir the Kidney through Heart activity, prioritizing Heart before Kidney, force Yang to scorch Yin through coercion. Coercion causes Qi to descend, leading to the loss of control over the *Dantian* and the abandonment of the fundamental Yuan Yang. The Kidney should be sufficient; when Kidney Essence is full, Yang arises from the earth, moving from Kidney to Heart. Those who prioritize Kidney before Heart, using Water to regulate Fire according to nature, find that Qi ascends naturally and all meridians arrive in harmony. This is indeed the true mechanism of creation. Therefore, frivolous individuals often act out of coercion and thus frequently suffer from deficiency-wasting syndromes (*Xulao*), hindering fertility. Honest and sincere individuals follow natural processes, allowing all things to thrive, so why worry about lacking descendants? Those seeking offspring should strive to understand the true mechanism of the Yang Dao.