Do you guys believe in feng shui? 

Feng Shui derived from experience. Take as an example, the orientation of a house should allow ample air exchange, come in and settle down, enough sun light but not that it heat or cools the interior too much. Other like you will not want your house directly under or too near a hill or right beside a river, when you can have land slide or flood. Many ancient Chinese cities have the aforementioned characteristics. Then you turn these common sense with some ancient Chinese philosophy based on Yin - Yang, landscapes, mountains and water  and it becomes Feng Shui.

Cheers.