Traditional reference / Fun
Online Moon Blocks (Jiaobei)
Try a respectful moon block simulation with three outcomes, throw history and a consecutive Sheng jiao counter.
Online Moon Blocks (Jiaobei): Simulates two crescent moon blocks, each equally likely to land flat or convex side up. One of each is Sheng jiao, both flat is Xiao jiao, and both convex is Yin jiao. Keep a question in this browser, throw the blocks, and review your history. This is for curiosity or practice and does not replace a temple ritual or make religious claims. Runs 100% locally in your browser with zero server file uploads.
- Category
- Astrology & fortune
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
Consecutive Sheng jiao: 0
Throws: 0
Throw history
Moon blocks are used in temple traditions to ask a question. One flat and one convex face is commonly read as assent; two flat faces as laughter or an unclear question; two convex faces as a negative response. Customs differ, and some people seek three consecutive Sheng jiao.
This is a simulation for curiosity or practice, not a substitute for the temple ritual. It makes no religious claims. Each block has an equal chance of either face, so Sheng jiao occurs about half the time and each other outcome about a quarter.
Cultural context
Taiwan temple traditions use moon blocks to ask questions. Sheng jiao is commonly interpreted as assent, Xiao jiao as laughter or an unclear question, and Yin jiao as a negative response. Practices vary, and some worshippers seek three consecutive Sheng jiao. Taiwan’s Ministry of the Interior religion portal (https://religion.moi.gov.tw/) provides cultural context for temple practices.
Simulation probabilities
With two independent equally likely faces, the four combinations have equal probability. Two combinations produce Sheng jiao (50%); the other outcomes each have one combination (25%). The result is a browser simulation for practice, with no religious authority.
How to use it
- Enter an optional question.
- Throw the two blocks.
- Read the outcome, history and consecutive Sheng jiao count.
Privacy & limitations
Your inputs and results stay in this browser. Nothing is uploaded.
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Frequently asked questions
What do the three outcomes show?
One flat and one convex face is Sheng jiao; two flat faces are Xiao jiao; two convex faces are Yin jiao. The page explains common readings, which can differ between temples.
Is my question saved or sent anywhere?
The question stays in memory in this browser tab. It is not uploaded or saved to local storage. Reloading clears it and the throw history.
Free tool · runs in your browser · no account required