Is there any geomantic theory about decorating the floor of the new house and putting copper coins under the floor? Tell me in detail.

Hello, this is about Feng Shui. I only know a little. I've heard of it. One is not to let money flow out, and the new house represents luck. Besides, Feng Shui is a place that you don't understand and value. For example, is there a saying that the loess slope is oriented? Leeward is a good house, haha,