Five baht is the longest-used currency in the history of coins in China, and it is also a kind of currency with weight as the unit, which has played a certain role in the 5,000-year history of currency development in China. In the fifth year (1 18 BC), founding ceremony, the Emperor of the Western Han Dynasty, issued five baht money in the Central Plains, which was the first of its kind in the Han Dynasty. Until the end of the Eastern Han Dynasty, except for some minor changes in the middle (such as the reign of Wang Mang), during the 400 years between the Western Han Dynasty and the Eastern Han Dynasty, five baht money ruled the whole country. Five baht money laid the tradition of China's square hole. This small copper coin has an outer circle and an inner circle, symbolizing heaven and earth. Cast the word "five baht" with a seal script below. "Baht" is an ancient weight lecturer's unit, and a quarter of one or two is one baht, so the so-called "five baht" is actually very light.

Baidu has pictures.