What is the name of that ancient ring on the thumb?

The ancient ring on the thumb is called a trigger finger.

The trigger finger is a hand guard that is worn on the hooked finger to hold the bowstring. At the same time, when releasing an arrow, it can also prevent the bowstring from being sharply drawn back to bruise the fingers. The ancient people also called "machine", meaning similar to "trigger", indicating that the role of the trigger finger is equivalent to the trigger.

The archer's thumb ring was first seen during the Shang Dynasty (17th to 11th centuries BC), and the use of the trigger finger became very popular during the Spring and Autumn Period and the Warring States Period (8th to 3rd centuries BC).

Trigger finger history:

Over the thousands of years, the shape of the trigger finger, there have been many styles. The most important ones are the sloped trigger and the barrel trigger. Slope trigger finger appeared earlier, the earliest string groove, and later canceled. In China, the sloping trigger was used until the Ming Dynasty. Abroad, it is still used in Turkic-Turkish and Korean. During this period, various styles of trigger fingers existed. In Mongolia and Qing Dynasty, the barrel-shaped trigger finger was mainly used. Traditional Han trigger finger and Mongolian trigger finger is slightly different: Han trigger finger from the side view is trapezoidal, that is, one side is high and one side is low, while the Mongolian, Manchu trigger finger is generally cylindrical.

According to the evidence, the barrel-shaped trigger finger was mainly unearthed after the 14th century, and after the 17th century, the Han developed the trigger finger into jewelry.

Trigger finger significance:

Pressing the significance of the ring, worn on the finger, contains a warning notice, which is engraved with the "quit smoking", "quit drinking", "quit coloring" of the words. The words "quit smoking", "quit drinking", and "quit coloring" are engraved on the ring. Anyone who persuade people to quit smoking, alcohol and sex, the gathering of funds for the engraving of a ring to give. The most common eight banners children's ring, more engraved with their names, this wind has not been mixed.