What was the unit for measuring distance in ancient China?

In ancient China, the unit of length for measuring land-step, ruler and fork ruler.

As an ancient unit of length, "bu" had different scales in different dynasties.

The units of length in Nine Chapters Arithmetic, Island Arithmetic, Zhang Qiu Arithmetic and Weekly Arithmetic are parallel, according to the relationship of "step by step" in ancient China: 1 step = 6 feet, 1 Li = 180 sheets = 180 sheets.

The "market system" is a transitional system that the government of the Republic of China reformed China's traditional weights and measures in order to fully switch to the metric system in the 1920s. The municipal system is standardized in 1929 and can be converted into metric system. 1 step = 5 feet.

Sun Tzu's classic calculation of the art of war says: "Degree begins suddenly. To realize its suddenness, the silkworm suddenly spun silk, with ten suddenness as the trace, ten silk as the horn, ten points, ten points, ten points, ten inches, ten inches as the ruler, ten feet as the lead, fifty leads as the end, and forty feet as the horse.

In the past, the pace of land use was measured, and "step" was the ancient unit of measurement. The ancient "step" is not a modern step.

Xunzi's "Persuasion" "If you don't accumulate steps, you will be thousands of miles away." It means: if you don't go step by step, you can't go thousands of miles away. The "step" here is half a step, and the step is one step, one step. From the Zhou Dynasty to the Han Dynasty, six feet was a step.

In Sun Tzu's calculation, it is recorded that the length units are: 10 foot, 10 inch, 1 step = 6 feet, 1 Li = 300 steps, 1800 feet.

There were two kinds of rulers in the Tang Dynasty, the big ruler was adopted by the society, and the small ruler was a special ruler for ancestral temple etiquette and ephemeris, 1 step = 5 feet. Later it gradually evolved into 1 step = 5 feet, 1 mile = 300 steps = 1500 feet.

1929 The unit of length stipulated in the Weights and Measures Law is: 1 Li = 150 sheets, 1 sheet = 10 foot, 1 step = 5 feet; Area unit: 1 ha = 100 mu, 1 mu = 10 min = 60 abbot, and the basic conversion is 1 ha = 10000 m2 =1. One acre is equivalent to 666.67 square meters.