The Twelve Life Stages (Shi Er Chang Sheng): A Stem’s Strength Cycle

Definition

The Twelve Life Stages describe the twelve energy phases a Heavenly Stem passes through as it "lodges" in the twelve Earthly Branches — a cycle from conception and growth to peak and decline. It is the core tool for judging a stem's strength in a given branch and whether it is rooted.

The Twelve Stages

In order: Long-Life (长生), Bath (沐浴), Cap-and-Sash (冠带), Officer (临官), Emperor-Flourishing (帝旺), Decline (衰), Sickness (病), Death (死), Tomb (墓), Cutoff (绝), Conception (胎), Nourishment (养). Of these:

• Officer (临官) is the "Salary" (see Lu Shen), where a stem is most grounded and strong;
• Emperor-Flourishing (帝旺) is the peak — a yang stem here forms the Yang Blade;
• Tomb (墓) is the vault, Cutoff (绝) the weakest point.

Yang Forward, Yin Reverse

Yang stems run forward, yin stems reverse: Jia Wood's Long-Life is at Hai, its Emperor at Mao; Yi Wood's Long-Life is at Wu, its Emperor at Yin. Fire and Earth share stages (Bing/Wu Long-Life at Yin, Ding/Ji at You, in the fire-earth-shared system this site uses).

Nature and Use

• Long-Life, Officer, and Emperor are strong positions — the stem is rooted and can carry Wealth and Officer;
• Death, Tomb, and Cutoff are weak — the stem floats and needs support.
• The stages judge stem strength and also derive spirit-stars (e.g. Peach Blossom takes the trine's Bath position).

Common Misconception

"Emperor-Flourishing is always best." Peak invites reversal — a yang stem at Emperor becomes the Yang Blade, and over-strength then needs restraint; true strength is read from the whole-chart strength.

Significance in Chart Analysis

The Twelve Stages are the basic scale for judging the Day Master and every stem's strength. Generate your chart with the free BaZi calculator and learn more in the BaZi learning center.

The full 十二长生 grid — 10 stems × 12 branches

All 120 cells. Yang stems run forward from their 长生 branch and yin stems run backward, so a stem's stage in any branch can be read directly off the row.