纳甲装卦是六爻占卜的核心步骤，将天干地支和五行配入卦的六个爻位，再结合世应、六亲、六神等要素进行综合分析。它源于汉代京房易学，是中国最系统化的占卜方法之一。Na Jia is a core step in Liu Yao divination that assigns Heavenly Stems, Earthly Branches, and Five Elements to each of the six lines, then analyzes with aspects like Shi-Ying positions, Six Relations, and Six Spirits. It originated from the Han Dynasty scholar Jing Fang.

世爻代表占卜者本人，应爻代表对方或事物。世应之间的五行生克关系是判断事情吉凶成败的重要依据。不同的卦宫和卦变决定世应的位置。The Shi line represents the querent, and the Ying line represents the other party or subject. The Five Elements relationship between Shi and Ying is crucial for judging outcomes. Their positions are determined by the hexagram's palace and transformation.

三钱法（铜钱法）是六爻占卜最常用的起卦方式——掷三枚铜钱六次得出六个爻，然后通过纳甲装卦来进行系统分析。本工具帮助您完成起卦后的纳甲装卦步骤。The three-coin method is the most common way to cast a Liu Yao hexagram—toss three coins six times to get six lines. Na Jia arrangement then provides the systematic analysis framework. This tool helps with the Na Jia step after casting.