Because of its exquisite materials, fine workmanship and unique skills, it is also regarded as a very high-grade collection. The structure and principle are the same as those of the scale. The part containing the object is a small dish, the largest unit is two, as small as minutes or centimeters. Are also equal.
During the Ming and Qing Dynasties, with the development of industry, agriculture and commerce and the improvement of productivity, the manufacture, use and management of barnyard grass have reached a very complete level, but the non-metric unit of 1 kg is still used.
Most of the trays and scales of the extended information Sima scale are precision work. Many Sima scales are made of ivory or precious wood, such as ebony. The smallest dimension has a diameter of only 0.3 cm and a length of only 10 cm.
Legend has it that it evolved from the stars in the sky, and the color must be white or gold. The first star of the scale is called "fixed star", the weight is hung on the fixed star, the scale is hung empty, and the balance beam is just balanced, which is commonly called full.
There is a Hakka proverb: "Sima Cheng, Sima Luan, a good couple." It can be seen that Sima scale is a very precious artifact in people's minds. Sima Cheng's 1 kg is about 1.2 kg.
Baidu Encyclopedia-Sima Cheng