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尝观《笔谈》论六十甲子纳音，本六十律，旋相为宫，法也。纳音与《易》纳甲同法：干纳甲、坤纳癸，始于干而终于坤。纳音始于金，金，干也，终于土，土，坤也。五行之中，惟有金铸而为器，则音响彰，纳音所以先金。
纳音之法，同类娶妻，隔八生子，律吕相生之法也。甲子，金之仲，同位娶乙丑，隔八下生壬申；金之孟壬申，同位娶癸酉，隔八上生庚辰；金之季庚辰，同位娶辛已，隔八下生戊子。火之仲戊子，娶乙丑，生丙申；火之孟丙申，娶丁酉，生甲辰；火之季甲辰，娶乙已，生壬子。木之仲如是左行，至于丁已，中吕之宫。五音一终，复自甲午金之仲，娶乙未，隔八生壬寅，一如甲子之法，终于癸亥。
自子至于已为阳，故自黄钟至于仲吕皆下生；自午至于亥为阴，故自林钟至于应钟皆上生。夫上下生者，正谓天气下降，地气上升。数之所合，变之所由出也。干为天，坤为地，乾坤合而为泰；德为父，红为母，德红合而为东；干为君，支为臣，干支合而纳音生。是故甲乙为君，子丑为臣，子丑甲乙合而为金。盖五行之在天下，各有气性，有材位，或相济或相克，若成器未成器，旺中受绝，绝中受气，惟相配而取之为不同耳。此金之数之所以难同而又有海中沙中之异。
The discussion of the Sixty Jiazi Nayin in San Ming Tong Hui originates from the ancient cyclical generation principle of the sixty musical tones, which aligns with the Nayin theory in the Book of Changes: the heavenly stems begin with Jia (belonging to Yang) and end with Gui (belonging to Yin); Nayin begins with Metal (symbolizing the strength of heavenly stems) and ends with Earth (symbolizing the softness of earthly branches). Among the Five Elements, only Metal can be forged into instruments to produce sound, hence Nayin starts with Metal as the beginning.
The calculation of Nayin follows the musical generation rule of "like marrying like, skipping eight to give birth." For example:
The "formation through transformation" principle revealed by Nayin points directly to the essence: adversity (exhausted ground) is precisely the pivot of transformation. Just as Metal requires Fire to refine into a useful object, modern individuals' core competitiveness is also reshaped through challenges.
| Related Concepts | Explanation |
|---|---|
| Nayin in the Book of Changes | Assigning stems and branches to the Eight Trigrams, e.g., Qian encompassing Jia and Ren |
| Twelve Musical Pitches | Ancient musical tone standards, divided into six Yang and six Yin pitches |
| Five Elements' Flourishing, Active, Resting, Trapped, Dead | Energy states affecting the degree of "formation" |
Further Reading:
Modern Research:
Since no specific Bazi case appears in the original text, component tags are omitted here.