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I respectfully submit that Heaven has opened the auspicious fortune, entrusting the great throne to the Crown Prince; the Sage Emperor governs in a bright era, establishing eternal peace for all living beings. His voice and teachings overflow throughout the world, and his benevolent grace permeates the entire realm. Both Chinese and barbarians are peaceful and tranquil, with gods and humans rejoicing together. We reverently behold Your Majesty, wise and insightful, whose achievements rival those of Tang Yao and Shun; civil and military, sagely and divine, whose virtue surpasses that of Tang and Wu. Cherishing every inch of land, you widely cultivate the heart of doing good to others. Expanding the territory is not merely for statecraft and protecting the people; when issuing policies and practicing benevolence, it is essential to bestow broad charity and assist the masses. All directions rely on this, and all undertakings flourish. Grace covers heaven and earth, and merit will last for ten thousand generations. Grand strategies and great deeds expand the scale of former sages; holy sons and divine grandchildren consolidate the foundation of the High Ancestor. The ancestral temple and the state are as stable as a rock, and blessings and longevity are as high as Mount Tai. All who dwell within the universe equally receive the blessing of peace.

Your subject reflects that he cannot repay this kindness, so he privately imitates diligence and toil, respectfully presenting his loyal heart to the nine heavens, and carefully offering various prescriptions for your review. He pours out his humble views to slightly express his sincerity like a sunflower facing the sun.

I have heard that medicine relies on intent. Medicines should not be rigidly bound by fixed formulas but used appropriately according to the condition. If one targets the timing and disease accurately, even simple tools like spoons can cure critical illnesses, reaching profound and mysterious levels of skill. Since Shennong tasted hundreds of herbs to save the common people, and Huangdi distinguished the four regions to initiate the *Suwen* (Basic Questions), sage rulers and wise ministers of past dynasties have paid close attention to this. Filial sons and benevolent men since ancient times have all known to focus on it. The *Yujian* (Jade Box) and *Jingui* (Golden Cabinet) contain nothing but excellent prescriptions for saving the world; the *Zhouhou* (Elbow Behind) and *Nangzhong* (In the Bag) are none other than classics for reviving people. Generally speaking, humans live between heaven and earth, and their bodies consist of the Four Elements (earth, water, fire, wind). They may be invaded by wind, cold, summer heat, or dampness, or suffer from emotional stagnation due to joy, anger, sorrow, or overthinking. Suffering, happiness, glory, and decline all damage the spirit; hunger, fullness, idleness, and labor all injure qi and blood. When the primordial yuan (vital energy) is internally depleted by external stimuli, evil toxins immediately take advantage of the deficiency to cause external infections. This is inevitable for all living things and applies universally. Did not Confucius know how to guard against illness and preserve his body? Yet when Kongzi was ill, Confucius still went to inquire about his health and send medicine. Moreover, drug properties vary in cold, warm, benign, and toxic nature, while human bodies differ in deficiency, excess, strength, and decline. Without understanding these properties, how can one casually try them? One must have perseverance to benefit people permanently. Observation, listening, questioning, and pulse-taking must be detailed and cautious during clinical practice; tonification, purgation, dispersion, and unblocking require particular caution when administering doses. There must be an order to priority and urgency, and appropriateness in astringency, slipperiness, dryness, and dampness. Then, upon ingestion, ailments will be eliminated, and upon action, effects will appear. For instance, if the chest and heart feel full, radish can be taken to relieve distension; if the abdomen is bloated, *Pharbitidis Semen* (Qian Niu Zi) can be drunk to promote rapid evacuation. *Ephedrae Herba* (Ma Huang) disperses and causes sweating when entering the stomach and intestines; *Cucumeris Fructus Mutabilis* (Gua Di) promotes unblocking and causes salivation when reaching the throat. Drugs are effective if used correctly. Chewing *Mume Fructus* (Wu Mei) immediately makes teeth sour and saliva overflow; blowing *Gleditsiae Sinensis* (Zao Jiao) powder into the nose immediately induces sneezing and clears the airway. Eating spicy mustard greens causes tears to flow; biting Sichuan peppercorns causes qi stagnation. Turtle urine resolves trismus (lockjaw); rat bone promotes tooth growth; magnetite attracts needles; amber attracts mustard seeds; Luan glue reconnects broken strings; badger gall distinguishes poisoned cups. Blood does not coagulate when mixed with lotus root; lacquer disperses naturally when encountering crab. Onion mucus can be boiled with *Cinnamomi Ramulus* (Gui Zhi) to make water; toad venom paste can soften jade like mud. All substances have related properties, which wise individuals utilize according to circumstances. I briefly list a few examples to illustrate their unique functions. Truly understanding properties and mechanisms allows usage akin to divine inspiration. Thus, Bian Que and Hua Tuo each displayed astonishing skills; Ge Hong (Zhi Chuan) and Sun Simiao both left behind emergency prescriptions. Sometimes single herbs are used alone, sometimes combined. Single herbs have pure qi and act quickly; multiple herbs with conflicting flavors act slowly. Only mutually assisting herbs work together to achieve results. Conversely, incompatible or antagonistic herbs mixed together will fight each other and spread toxicity, worsening the condition instead of curing it, causing serious harm. Rather than failing to study deeply and see clearly, it is better to follow simple and easy-to-understand methods. Furthermore, simplifying complexity makes it convenient for emergencies. However, the severity of disease concerns our well-being; the quality of prescriptions determines life and death. Prescriptions must be precise and well-founded, not arbitrary or baseless. We must gather the strengths of many to achieve perfect efficacy.

Your subject comes from a medical family, born in a sage era, educated in the tradition of Mencius, and further cultivated in the works of Xuanyuan and Qibo. Honored with promotion, I deeply feel my own mediocrity. Fortunately blessed with imperial favor and duty, I travel by carriage to consult and investigate freely across rivers and lakes. Thus, I have visited famous mountains and great cities without omission; remote regions and small towns have also been thoroughly traversed. Because the Holy Sovereign fosters the era of Great Unity, your humble servant has diligently collected knowledge extensively. Visiting, searching, and collecting took seventeen years; discussing and studying involved thousands of cases. I gathered rare and excellent remedies from north and south, and secret essentials from ancient and modern times. Selecting those that are simple and easy, not only convenient for travel, but extracting their essence truly benefits both others and oneself. The collection is broad, and the verified effects are numerous. Day and night, I rejoice and admire. From morning to evening, I verify ancient records to categorize them, comparing types and listing items. The framework remains orderly, and groups are accurate. One can refer to the book to match symptoms with prescriptions, but treatment requires adapting medication to the situation. Even for the same symptom, one must carefully analyze new vs. old and severe vs. mild. One must select from various formulas, cautiously choosing between hard/soft and tight/loose approaches. For superficial skin conditions, light and clear herbs suffice; for deep-seated diseases in the gao-huang region, potent herbs causing "mingxuan" (dizziness/heavy reaction) reactions are necessary. Moreover, local climates vary in hot/cold, and constitutional endowments differ in thick/thin. Treatment for nobles and wealthy families differs from that for the poor; healing widows and nuns presents difficulties different from treating wives and extended family. The key lies in thorough understanding and clear insight, especially in precise preparation and appropriate use. Processing methods like frying, boiling, roasting, and baking were detailed by Leigong; exterior-interior and yin-yang theories were exhaustively explained by Qibo. Although I am not exclusively a practitioner, I occasionally study medical books. When encountering illness, I always administer medicine to rescue patients, and upon seeing efficacy, I acknowledge my limited perspective like a fly in vinegar or the acute hearing of a mouse.

We reverently behold Taizu Gao Emperor of the Holy Dynasty, whose divine merit and sagely virtue wove the fabric of heaven and earth; founding the dynasty and establishing its basis, he set laws for ten thousand generations. Recognizing the vastness of the four seas and the multitude of the people, he worried about their hardships. This not only shines through antiquity to illuminate the present but truly honors the past and inspires the future. Just as the *Yongle Dadian* (Great Canon of the Yongle Era) encompasses ancient and modern times, containing heaven and earth; recording all matters large and small without omission; detailing medical arts and sciences with precision; and achieving perfection in clothing, rituals, and culture. In recent years, whenever military and civilian labor is mobilized, clothing and grain are provided, and medicines are prepared in advance to alleviate hunger, cold, and sickness. People face no fear of premature death, and tasks achieve solid and complete results. Furthermore, in and around the capital, pharmacies are set up on main streets, and dining halls on important roads, providing universal relief to poor, sick, hungry, and cold civilians, soldiers, and merchants, distributing patched clothes at a cost of tens of thousands of gold. Those blessed with relief kneel and pray to heaven; those freed from illness without worry raise voices of joy to the skies. When ordering me on missions, imperial medicines were also granted for travel, allowing all corners of the world to share the holy grace; from the ends of the earth to the poles, everyone bathes in this benevolence. Placing citizens in longevity and health, calling forth harmonious qi in the universe. Wind and rain are timely, seas are calm and rivers clear; people enjoy peace, and creatures are free from disease. Merit rivals creation, and virtue surpasses shaping. Since the birth of humankind, there has never been such greatness as today.

Your subject is fortunate to be born in this bright and prosperous era, nurtured within the potter's wheel of education, receiving grace and favor, engraved in bones and heart. Holding only the sincerity of an ant, unable to offer even a speck of dust in return. Of no help to the peaceful era, what difference is there from wood and stone? I have carefully compiled the "Yijian" (Easy and Simple) prescriptions to slightly aid the welfare of all subjects. I humbly request Your Majesty, in your leisure, to inspect my humble intentions. Your subject feels infinite emotion, gazing up at heaven and the sage, with utmost excitement and trepidation.

On the fourth day of the seventh month of the 21st year of Yongle, Hu Ying, Minister of Rites (Left Vice Minister) and Imperial Envoy, respectfully submits this memorial.