Sách linh đồ nội đan lấy long–hổ làm pháp tượng, chỉ dẫn giao cấu, thăng giáng và giám định chân–giả. Nằm cụm linh đồ cùng các bản tu chân thái cực, kim dịch ấn chứng.
Ứng dụng: Tra pháp tượng long hổ khi đọc đan kinh nam tông.
道藏洞真部靈圖類，一卷，屬金丹龍虎交媾之「手鑑」——案頭可鑑的簡圖訣。以龍（汞、木、火、心液）虎（鉛、金、水、腎氣）為綱，圖示坎離交、位置、時辰與防危走失。強調真龍真虎非心腎渣滓，而為先天乾坤交後之坎離中爻；手鑑意謂執圖自照，識藥識火，勿認幻為真。與《金液還丹印證圖》《修真歷驗鈔圖》同屬靈圖類實修譜系，文字簡而象密，重在「鑑」定鼎器、藥物、火候三要。
⚡ Ứng dụng: 修持中用以對照景象是否「真交」；命局金水與木火兩黨對峙者，可參龍虎既濟之理取用，忌兩強交戰無媒（土）。
🔗 Liên quan: 金液還丹印證圖；入藥鏡；龍虎還丹訣
The chart proves that dragon-tiger union is not a mythic image but a measurable sequence of qi phases: when lead and mercury, fire and water, are timed correctly, their mutual conquest becomes mutual generation. It demonstrates that failure in neidan is almost always a timing error, not a substance error—wrong fire at the wrong hour dissolves the elixir that correct sequencing would have fixed.
1. Map your daymaster’s yin-yang and five-element polarity onto dragon (yin spirit) vs tiger (yang essence). 2. Time major fire phases only when chart markers say the two streams are approaching conjunction (e.g., zi-wu axis, seasonal pivots). 3. Use the diagram’s organ/channel labels to locate where clash will appear as illness or emotional surge. 4. In cultivation sessions, reverse the usual order when the chart shows inverted flow—do not force standard sequence. 5. Treat every failed session as a clock/phase error first, substance second.
Unlike plain “lead-mercury” verse texts, this work argues by spatial diagram: proof is geometric, not poetic. It differs from later *Wuzhen pian* style metaphor by making timing coordinates primary and moral language secondary—because the claim is operational success, not doctrinal orthodoxy.