Which brand is the best Feng Shui compass in China?

Which brand is the best Feng Shui compass in China? The answer is: generally, it is not a precision instrument, and good use means good disk. There are no particularly good compasses and manufacturers. I've played dozens of compasses, and it's entirely luck to pick out a good one. It is impossible to compare the quality of a disk, mainly a square disk. Basically, we should pay special attention to the following two aspects: first, the inner ring should be able to move, and a good disk can rotate freely with a gentle pull. If the rotation is not flexible, it is difficult to align the needle and the disk in actual operation. Turn the inflexible disk, push the dial hard, and the aligned pointer will shift again. If you don't dial hard, the disk will not turn, which will increase the difficulty of line alignment and make the line inaccurate. Second, it is necessary to repeatedly toggle the detection reticle, try it several times, and toggle it repeatedly. Crosshairs at 0 degrees, 90 degrees, 180 degrees and 270 degrees are the best disks. Repeatedly poking, the compass crosshair is not at the four points of 0 degree, 90 degree, 180 degree and 270 degree, and the compass has problems in actual operation, which is not a good disk. There are three problems with this difference; 1. It is possible that the crosshair holes are not at the standard 90-degree interval, that is, the crosshair has a deflection angle. 2. It may be that the scale of 360 degrees is wrong. 3. The gap between the inner disk and the outer ring of the fixed inner disk is large, and the inner ring slides and shifts, so the detection is not allowed. The above two aspects are very important when selecting plates. It's just about compasses and other scales, not which is good or bad, because every compass is deliberately wrong at the beginning of manufacturing, in order to prevent others from counterfeiting. I really know the compass. As long as the compass has the correct 360-degree scale, nothing else matters, because those circles and scales should be kept in mind. Know it by heart when using it, and don't be limited by the contents and scales on the disk.