The ounce (translated as ounce in Hong Kong) is an imperial unit of measurement, with the symbol ounce or oz. When used as a unit of weight, it is also called Yingliang.

Mark (ancient coin)

The mark was an ancient European unit of monetary measurement, originally equivalent to 8 troy ounces (249 grams) of pure silver, and later evolved into half a pound.

"Mark", as the name of an ancient monetary unit, was once commonly used in ancient western Europe, including England. After King Richard the Lionheart of England was captured in Germany in 1192, he was released after paying a ransom of 150,000 marks to the Holy Roman Empire.

Extended information:

Carats were first used by the ancient Arabs. It is not a special unit of measurement, but a fruit called the carob tree. One characteristic of this fruit is that the weight of each fruit is roughly equal.

Gemstones were produced in ancient Arabia, and there were many varieties of gemstones. However, weighing instruments such as scales had not yet been invented at that time, which brought a lot of inconvenience to the commodity trade of the ancient Arabs.

In order to solve this problem, someone proposed to use carob fruit as the unit for measuring gemstones. This proposal gained people's support. Gradually, the use of "carat" as the unit for measuring gold and stones was fixed. And it is widely used by countries around the world.

Ancient unit of weight

Jun: Thirty kilograms is one jun; ten gui weighs one baht, twenty-four baht weighs one tael, and sixteen taels weighs one kilogram.

Tnium and Yun are the earliest units of weight in China, with Tannium and Yun seen on Yi vessels being the earliest, just like the units of shekel and mina used by the ancient Assyrians. There are two kinds of shekels Standard, one weighs seventeen centimeters and one weighs eighteen centimeters.

Reference source: Baidu Encyclopedia_Mark (an ancient European monetary unit of measurement)