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](/bazi/glossary/tian-gan).

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](/bazi/glossary/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](/bazi/glossary/yang-ren); - **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](/bazi/glossary/qiang-ruo).

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](/bazi/chart) and learn more in the [BaZi learning center](/bazi/learn).