Brief introduction of ancient length units
About 5000 years ago, ancient Chinese began to use length units. At that time, there were various units of length, but there was no unification. There are minute, inch, ruler, ruler, guide, centimeter, milli, silk, second and sudden, and the basis of each length unit is different. Until more than 2,500 years ago, there was a great official named Shang Yang in the State of Qin who unified the length of 1 foot and 1 foot. This has a great influence on the development of length units in history.
About 500 years later, people in the Han Dynasty unified five units of length, namely, minutes, inches, feet, feet and lead, and invented measuring calipers. Until New China, the four most popular units of length were minutes, inches, feet and feet.
Minute: a relatively small unit of length in ancient times, which stipulated that 10 minute was equal to 1 inch. 3 points is equal to the current1cm; Inch: A unit of length with a large fraction. It was stipulated in ancient times that 10 inch was equal to 1 foot. 3 inches is equal to the current 10 cm; Ruler: It is also a relatively large unit of length. It is stipulated that 10 foot is equal to 1 foot. 3 feet is equal to the current 1 meter; Zhang: It is also a commonly used unit of length. It is stipulated that 10 foot is equal to 1 foot. 3 feet equals 10 meter.
Generally speaking, the ancient units of length can be divided into five types: minute, inch, ruler, ruler and quotation. About 5,000 years ago, the ancients in China began to use units of length. You got it?