Bone Weight · Yuan Tiangang
称骨 · 袁天罡
Chenggu
Weigh your birth moment and read the pattern — free, in about 30 seconds.
- Bone weight
- 8-section reading
- Unknown hour? See all 12 possibilities
Weigh your birth moment and read the pattern — free, in about 30 seconds.
Only a birth date is required; the time is optional. The weight is calculated first, then the English reading follows.
Free · no sign-up · nothing stored · about 1,200 words.
Chenggu (称骨, “weighing the bones”) is a folk method attributed to the Tang astronomer Yuan Tiangang (袁天罡). It gives each part of the birth moment a weight in traditional Chinese units (钱 qián and 两 liǎng), adds them, and looks up a short verse for the total. It takes about thirty seconds. It is not a full chart.
The old verses are blunt — often fatalistic, sometimes cruel, and shaped by a world very different from ours. We keep the method and the weight. We do not lead with the old sentence. The English reflection below reads the pattern as temperament, timing and choice, with the chart's own BaZi as the deeper place to go next.
“A mirror is useful because it shows you the face you brought in. It is not useful if you mistake it for the room.”
The total is the sum of four small weights. We use the traditional tables, with the year turning at Li Chun and the month and day taken from the lunar calendar.
The 60-year Jiazi cycle, with the year turning at Li Chun rather than the lunar new year. Each year has its own weight.
The lunar month of birth, from the first month to the twelfth. Leap months use the ordinary month weight.
The lunar day, from the first to the thirtieth. This is the calendar day, not the BaZi day that turns at 23:00.
The twelve traditional hours. If the hour is unknown, the page shows the range the total can take instead of a false precision.