Luban ruler, the full name of "Luban construction ruler", also known as "Luban ruler", is a measuring tool used in building houses, similar to the curved ruler used by craftsmen today. The Luban ruler is about 42.9 centimeters long. According to legend, it was made by Gongshuban of the State of Lu in the Spring and Autumn Period. Later, the eight characters were added through the Feng Shui community to measure the good and bad luck of the house, and it was called the "door meter ruler". Also known as "square ruler", it is a woodworking tool mainly used to check whether the planed boards, planks and structures are vertical and the edges are at right angles. 1 Luban ruler = 0.8 city ruler. Luban ruler was integrated with Dinglan ruler soon after its creation, and later with inches and centimeters. It is an important tool for measurement and correction. Due to its special functions, it is most widely expressed in Feng Shui culture and architectural culture. 1. Wealth: Ji, refers to money and talents. A. Financial virtue: refers to performance in terms of wealth, virtue, and merit. B. Treasure house: a metaphor for obtaining or storing precious items. C. Liuhe: harmony and happiness. Liuhe forms the four directions of heaven and earth. D. Welcome blessings: welcome blessings. Fu means happiness and benefit. 2. Disease: represents evil. Refers to injuries, disasters, illnesses and disadvantages. A. To withdraw money: to lose money or to lose money. B. Official affairs: mostly refers to public matters such as corruption, bribery, and lawsuits. C. Firm: refers to the disaster of jail. D. Lonely and widowed: refers to the behavior of being lonely and widowed. 3. Li: represents evil, referring to the separation of six relatives. A. Changku: There is a saying of prison in ancient times. B. Robbery of wealth: destruction and depletion of wealth. C. Official ghost: refers to things caused by official evil spirits. D. Lost: It means things are lost and people are separated. 4. Righteousness: represents good fortune. Refers to behavior that complies with justice and moral standards, or conducts fundraising and charity. A. Having a baby: In ancient times, a boy was called a baby. B. Benefits: Increased financial benefits. C. Takako: An heir who can become famous in the future. D. Daji: Good luck and good luck. 5. Official: represents auspiciousness and refers to official luck. A. Shunke: Successfully passed the exam and won. B. Windfall: unexpected wealth. C. Jinyi: income Jinyi. D. Wealth: Wealth and power. 6. Robbery: represents evil, meaning being robbed or coerced. A. Farewell: that is, farewell forever. B. Withdraw: Refers to filial piety. C. Leaving hometown: leaving one’s hometown. D. Property loss: loss or loss of property. 7. Harm: represents evil and disaster. A. Disaster: Disaster comes. B. Die Jue: Die cleanly. C. Illness: The disease is coming. D. Talk: quarrels and quarrels. 8. Ben: represents auspiciousness, the base or ontology of things. A. Wealth arrives: that is when wealth arrives. B. Admission: Admitted to the exam. C. Jinbao: attract wealth and treasure. D. Xingwang: prosperous. Ding Lan Ruler is an essential tool for Feng Shui masters nowadays. It is mainly used to measure and determine good or bad luck when building tombs or placing ancestral tablets and sacred tablets. The ruler is 39 centimeters long and is divided into ten grids, each grid is divided into four small grids; each of the ten grids is printed with words representing good and bad luck, namely "D": the lucky star and the third wealth, Deng Ke "Harm": oral and tongue disease before death. "Prosperity" from the end of disaster: Heaven's virtues, joyful events, treasures and blessings "Bitterness": loss of office, ghosts, robbery of wealth, no heirs "Righteousness": great good luck, wealth, prosperity, benefit and benefit to the heavenly treasury "Official": wealth and honor, fortune, windfall, good luck "Death": Leaving home, dying, leaving a family, losing wealth. "Prosperity": becoming a noble child, having children, prospering. "Loss": being lonely and widowed, working on official business, returning wealth. "Wealth": welcoming blessings, Liuhe, and bringing in treasures and wealth. The meaning of the above cross and its small boxes is not difficult to understand. This answer is recommended by Ren Jilan, a science education classification expert