According to folklore, the wooden scale was invented by Lu Ban. According to the six stars in the Big Dipper and the Southern Dipper, 13 stars are carved on the scale, and 13 is regarded as one catty. After Qin Shihuang unified the six countries, he added "Fu Lushou" Samsung, which is exactly sixteen stars, and changed a catty to 16 Liang, sending letters with unified measurement;
Another statement is made by Fan Li. He was inspired by the difficulties of the fishmonger. He first used a bamboo pole to release water while releasing fish, and invented it by using the lever principle. Later, he revised it. According to the six stars of Beidou and Nandou, he carved 13 stars on the scale, and set 13 as a catty. But because some businesses are short of two catties, they added "Fu Lushou".
Extended data:
In 1950s, the state carried out the reform of measurement units, and changed the unified weighing system to 10 two kilograms. The manufacturing technology of Hanzhong manual steelyard was introduced from Wuhan, an important industrial and commercial city at the intersection of Hanshui River and Yangtze River, under the special background of War of Resistance against Japanese Aggression more than 70 years ago. In modern China, the three towns in Wuhan are famous for their industrial and commercial economy and transportation, and the manual weighing industry is even more famous.
1937, War of Resistance against Japanese Aggression broke out in an all-round way. The Japanese invaders ravaged a large area of East China, and big cities such as Beiping, Nanjing, Shanghai and Wuhan fell one after another. As the refugees from the occupied areas fled to the relatively safe western provinces, most of the famous "Futai" recording and weighing technicians in Wuhan fled to Shaanxi.
At that time, the national government moved various colleges and universities to the west, and Hanzhong was the rear area of the Anti-Japanese War, where commerce, economy, culture and education flourished rapidly. After the masters of "Futai" in Wuhan fled to Hanzhong, they used the raw materials and markets in Qinba Mountain area to reorganize their old businesses. Hanzhong and Xi have become two major weighing instruments producing areas in Shaanxi.
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