Pay attention to the usage of the ruler.

In the past, carpenters were subject to many restrictions when making doors. First of all, they didn't build the East Gate in spring, the South Gate in summer, the West Gate in autumn and the North Gate in winter. Secondly, there are three symbols "○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ Fourthly, only the size of the eight-character door "Cai" and "Yi" can be used for height or width, and the size of other six-character doors can only be used for width, not only can not be converted to each other, but also can not be used for height.

The usage of this Lu Banchi is actually very simple. It is clearly written on the ruler, four colors are red and four colors are black. If the size falls on red, it means good luck, and vice versa. But Lu Banchi and ruler (10 inch meter) still have matching methods. The book of Yin and Yang says: One white, two black, three green, four blue, Huang Wu, six white, seven red, eight white and nine purple are all stars. Only the white star is the best. The method used, regardless of the ruler, is in inches, and one inch, six inches and eight inches are auspicious. Being smart as a ruler is a good thing, and participating in it is a good thing. It's called "white pressing". Its ruler is only one foot and ten inches.

This means paying attention to the rulers. If the size of the door falls in one inch, six inches or eight inches, it is called pressing white, which means good luck and good door. But the difficulty is to use both rulers well. If you have to go in, use Lu Banchi to measure the red color, and then take a ruler to measure the white color.

For example, this door is two feet and one inch wide, so it is called' easy door is white'. These two feet and one inch refer to the length of this ruler. If you look at feng shui, you can only look at the ruler inch by inch. This inch is just one of the four words "one white, two black, three green and four green" on the ruler, so it is also called "pressing one white" (one inch is white, two inches are black, three inches are green, and so on).

After that, take the Lu Banchi quantity. How to convert two feet and one inch into Lu Banchi? Lu Banchi is one foot, four inches and four minutes long, divided into eight squares, each with four meanings. The mathematical algorithm is 1.44 divided by 8 to get 0. 18, which is the length of the previous grid in Lubanchi. After dividing the ruler size of the door in use by 0. 18, the number obtained can be used to calculate the quality of the door. For example, the width of the door is two feet and one inch (building ruler), which is 2. 1 divided by 0. 18, and the number is 1 1.66. After that, according to the figures of wealth, illness, divorce, righteousness, official, robbery, disaster and luck, wealth is zero at first glance, and this one falls. The 0.66 after 1 1.66 can explain that this door is the third of the four items of Yimen (0.25 equal parts), and the three items of Yimen are Lu Banchi's' baby son'-a child who can be a dignitary in the future. In this way, this door has gained a saying of' precious son', which means that future generations can get ahead. (Cai Yiguan Ji four doors are red, indicating Ji. Sick and robbed four people)

If you want to make money, you can open the door at four feet, three inches and eight minutes. If calculated with a ruler, these three inches are green and eight points are white, which is called three green and eight white, which is what Jimen said. In Lubanchi, 4.38 is divided by 0. 18 to get 24.333. If you count it, it falls on the second item of' Caimen'.

The four items of this financial door are-financial virtue: it refers to the performance in finance, morality and merit. This kind of door is to make money for the cause. It can be said that the doors of career and money are mostly used by people with official positions at home.

Treasure house: a metaphor for acquiring or storing precious things. This is the door of wealth, mostly used by business people.

Liuhe: Harmony and happiness. Liuhe is the square of heaven and earth. Often used in large families.

Welcome happiness: welcome happiness. Happiness is happiness and benefit. Often used for well-off families to seek peace.

This four-foot-three-inch-eight gate is called a "treasure house", and the people who own it are rolling in money.

In short, the doors are different and the places used are different. According to Lu Banchi's ruling in Qing Dynasty, there were 24 124, which were divided into Jiafumen 3 1 one, Yishun Gate 3 1 one, Lu Guan Gate 33 and Fude Gate 29. How big are the gates of yamen town and minister's office? Some gates have their own grades except those that the royal family can't use indiscriminately. Including what the yamen opens and what the door is, there are opinions, so I won't list them one by one. There are too many arguments about setting doors.