Place five stone balls at the door. According to Feng Shui, the circle is Tai Chi, which can transform all things and resolve various evil spirits. It also symbolizes the interdependence of the five elements. There is also the symbolic meaning of the threshold. Folks use the threshold as a thing to prevent the outflow of wealth, which means gathering wealth.
In fact, placing five balls at the door not only plays a beautiful and practical role in Feng Shui. Practically speaking, it functions as a certain range of traffic restrictions, such as restricting the passage of large vehicles or vehicles. From an aesthetic point of view, it is definitely much prettier than tools such as barbed wire.