Flying stars in the sky and Hafu are more accurate.

The stars flying in the sky are accurate, but difficult to learn. The Eight Houses Law is relatively simple, but it has been questioned in recent years. For buildings with unknown construction year, or where it is difficult to accurately measure the direction of the mountain, it is recommended to use the Eight Houses method. If the year and mountain direction are clear, it is suggested to use the method of flying stars in the sky. It is better to ask a professional feng shui master to really regulate feng shui. If you have a little knowledge, you would rather not do it.