2. Wang Cai ruler, also known as "Lu Banchi" (Feng Shui ruler), should meet certain dimensions in terms of the height and width of the relevant doors of the villa, which are auspicious dimensions. Different sizes will bring different meanings. Auspicious has auspicious meanings, such as prosperous wealth, increasing people, good popularity, auspiciousness, promotion and so on. Fierce means fierce, such as official disaster, tongue and mouth, financial destruction, loss, loss and so on. Therefore, we should pay attention to this when using Wang Cai ruler.