What are the precautions for choosing a house feng shui?

Feng shui standard: there are mountains behind, green dragons on the left, white tigers on the right, mountains in front and halls in the middle. The winding water makes the grave gather wind and gas, making people rich. The vastness of the ocean can accommodate ten thousand horses, which makes the future generations have a bright future of Wan Li and a prosperous future. Lu Ban's spell records: Fuyi, natural landscape, town house building, resisting all disasters, auspicious house, prosperous home, town house is also a treasure trove of geomantic omen.