丁壬合

Ding-Ren Combination and Wood Transformation

Ding-Ren, 丁壬合木, is the traditional Heavenly Stem combination associated with Wood. Finding 丁 and 壬 together establishes the pairing; it does not by itself establish transformation into Wood. Transformation involves the chart's seasonal support and surrounding stems.

In a pairing that retains its individual stem relationships, 壬 remains Water and 丁 remains Fire. Their positions and Ten God labels help explain how they relate within the chart.

Finding the Pair in the Heavenly Stems

The upper character of each pillar is its Heavenly Stem. In 庚申, 癸未, 壬子 and 丁未, the stems are 庚, 癸, 壬 and 丁. 壬 and 丁 sit next to each other in the day and hour positions.

The day stem 壬 is the Day Master, the reference point for the Ten Gods. Relative to 壬, the hour stem 丁 is 正财, Direct Wealth. Here, Direct Wealth names a stem relationship. The vocabulary is introduced in BaZi basics.

Worked Example: 1980-08-07 at 13:00, Female

Take a woman born on 1980-08-07 at 13:00. Her four pillars are:

The adjacent day-hour stems form a Ding-Ren combination. The month branch is 未, and the four revealed stems contain neither 甲 nor 乙, the two Wood stems.

The chart's pattern is 正官格, Direct Officer. Its Day Master is relatively weak, 偏弱. See How to read a BaZi chart for the chart's components.

Branch Relationships Beneath the Stems

Below the stems, the year branch 申 and day branch 子 form 申子三合半合, a partial three-harmony Water combination. The day branch 子 and month branch 未 form 子未六害, a harm relationship.

Thus 壬子 participates at both levels: its stem 壬 pairs with the hour stem 丁, while its branch 子 connects with 申 and 未. The chart also repeats 未 in the month and hour branches.

Natal Pillars and Luck Pillars

The birth pillars stay in their year, month, day and hour positions. Luck pillars form a sequence of periods alongside that natal structure:

Compare each period's stem with the natal Day Master 壬: 壬 carries 比肩, 辛 carries 正印, and 庚 carries 偏印. Then locate the period's branch alongside the natal branches. Luck Pillar explains the sequence; The Ten Gods explains the labels.

Reading the Chart's Structure

The month pillar 癸未 places 癸 above 未; the hour pillar 丁未 places 丁 above the same branch. In this chart, 未 contains 己, 丁 and 乙. Its main hidden stem 己 is 正官 relative to 壬, giving the 正官格 pattern its name.

Explore Strong vs weak Day Master for these structural terms. Enter your birth date and birth hour in the free BaZi chart calculator to obtain all four pillars and locate your own stems and branches.

Month-Branch Comparison

Seasonal support, revealed Wood, adjacency and competing pairings all matter when assessing Ding-Ren transformation. The table compares the twelve month branches, showing the seasonal context to consider alongside the stems. In the example above, 未 supplies the month context, while 壬 and 丁 occupy adjacent positions.

Of the twelve month branches, 2 meet the transformation condition; the rest do not.