Lubanchi is not a ruler, but a comparison table. 1 half a foot = 1.368 city scale =45.6 cm; Usually the length unit has the "carry system"; For example: 1 ft = 10 inch, 1 inch = 10 minute, which means this is 10 decimal. But "Lu Banchi" has no "carry system", only words indicate good or bad luck. The first row of eight characters "1 wealth, 2 diseases, 3 divorces, 4 righteousness, 5 officials, 6 robberies, 7 harms and 8 books".
Extended data:
The ancient Lu half-foot was 46.08 cm long, and the modern Lu half-foot was 42.9 cm and 50.4 cm long respectively.
The ancients attached great importance to size when building houses. Architects often use white rulers to determine the overall spatial dimensions of houses, such as height, depth and width. Carpenters use Lu Banchi to measure and determine the size of doorways.
When modern people carry out architectural design and interior decoration, it is much more arbitrary to determine the overall size of the house and the size of the door. Few people build houses and decorate rooms according to the white ruler and Lu Banchi's Geely size.
Baidu Encyclopedia-Lu Banchi