Sihua (四化, "Four Transformations") is the timing layer of Zi Wei Dou Shu. Without Sihua, a ZWDS chart is a static portrait of life domains. With Sihua, it becomes a moving picture: the year stem (and decade Heavenly Stem) activates specific stars in specific palaces, producing real-time triggers for prosperity, power, recognition, or problems. Modern ZWDS reading leans heavily on Sihua because it bridges the natal chart and the present moment.
The four transformations
Lu (祿, Prosperity / Wealth): triggers when the year activates a Lu transformation in any palace, that life domain becomes financially or materially supportive. Quan (權, Power / Authority): triggers a power dynamic — leadership, decisiveness, or sometimes confrontation in the affected palace. Ke (科, Recognition / Reputation): triggers visibility, awards, public attention, intellectual recognition. Ji (忌, Problems / Restrictions): triggers obstacles, friction, or contained energy in the affected palace. Each year stem activates one of each across four different stars.
How the year stem activates Sihua
There are 10 Heavenly Stems (Yang Wood through Yin Water), and each stem produces a fixed Sihua mapping — a specific lookup table of which stars receive Lu, Quan, Ke, and Ji that year. For example, a Yang Wood (甲) year activates Lian Zhen Lu, Po Jun Quan, Wu Qu Ke, and Tai Yang Ji. This means in a Yang Wood year, whichever palace contains Lian Zhen receives a prosperity boost; whichever palace contains Tai Yang receives obstacles. The lookup is mechanical; the interpretation is contextual. To follow this against your own placements, compute your purple-star chart and look at the four palaces named by the current year stem.
Reading Sihua in time-cycles
Sihua applies at three time scales: the natal stem (permanent influence on which stars carry which transformations across the chart), the decade stem (10-year shift in which palaces are activated), and the annual stem (the strongest practical trigger for the current year). Skilled practitioners read all three layers simultaneously: the natal Sihua reveals lifelong themes, the decade Sihua reveals the current chapter's shape, and the annual Sihua reveals what is acutely activated this year. This three-layer reading is what distinguishes serious ZWDS from horoscope-style summaries.
Frequently asked questions
What are the four Si Hua transformations in Zi Wei Dou Shu?
Si Hua (四化) is a fixed set of four transformations that activate specific stars in your chart. Lu (祿) brings prosperity and material support; Quan (權) brings power and authority; Ke (科) brings recognition and reputation; Ji (忌) brings obstacles and friction. Each Heavenly Stem activates one of each across four different stars, so every year stem produces a unique Lu / Quan / Ke / Ji map across your 12 palaces.
Which Si Hua transformations does 2026 trigger?
2026 is a Bing Wu (丙午) year — a Yang Fire stem on a Horse branch. The Bing stem activates Tian Tong Lu (prosperity through harmony and softness), Tian Ji Quan (power through strategy and intellect), Wen Chang Ke (recognition through writing, communication, scholarship), and Lian Zhen Ji (obstacles around relationships, blood matters, and entanglement). Whichever palaces these stars sit in for your natal chart receive the matching activation across 2026.
How do natal, decade, and annual Si Hua differ?
The natal Si Hua comes from your birth year stem and acts as a permanent overlay — it tells you which stars carry which transformations for life. The decade Si Hua comes from the stem of the current 10-year Da Xian (大限) palace and shifts which palaces are emphasised for that chapter. The annual Si Hua comes from the current calendar-year stem and is the strongest short-term trigger. Skilled readers stack all three layers — natal sets the lifelong theme, decade names the current chapter, annual names what is acutely active right now.