What are the precautions for geomantic omen in rural courtyard fish ponds?

1. From the northwest or southeast, the water surface is not easy to reflect light, which is auspicious. This direction was originally a ze position, but it is not suitable for southwest and northeast.

2. It is advisable to use a semicircle instead of a whole circle, which means that "the monthly profit is a loss". If it is a pond or fountain, the shape should be perfect.

3. The door should not face north, and the north is Xuanwu Gate, which means "defeat"