Who can tell me the story of "half a catty"?

The phrase "half a catty is eight taels" comes from the popular period of ancient weighing instruments, and the cardinal number is 16. Because there was 16 in ancient times (until the 1950s), there was no difference between "half a catty" and "eight ounces". This point has been clearly explained by several netizens. What is the ancient name of 16 year? This is actually the key. If we had an octal system in ancient times, it would be "half a catty and four liang", right?

This is because China used to be called Jin 16 Liang, each of which is a star, and 16 Liang is 16 star. They are composed of the Big Dipper, the Six Stars of Nandou and the Three Stars of Fu Lushou. If the buyer is prosperous, he can get enough stars (especially Fu Lushou). If the buyer skimps on one or two things, he will lose his wealth; If he skimps on two, he will lose his wealth; If he loses three, he will lose his life. It can be seen that ancient people attached importance to honesty, and I hope everyone will remember this when doing business in the future.