Form factor
反弓 · 玉帶 / Road curve
水 / Water
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Tradition and practical correlate
The bend of the street — a road counts as “virtual water”: curving away (反弓) gathers nothing, curving to embrace (玉帶) shelters and gathers qi. We check which side of the bend the home is on.
What the tool checks
Which side of a mapped street bend contains the home.
What you can verify in person
Stand at the home and see whether the curve turns toward it or away from it.
Confidence and limits
Map geometry can show the curve; it cannot settle every local condition. Treat this as a grounded form observation, not a prediction.