Cause of occurrence:

In the early years of the Western Han Dynasty, the economy was depressed and there was a desolate scene everywhere. Emperor Gaozu of Han Dynasty and later Emperor Wendi and Emperor Jing of Han Dynasty learned lessons from the Qin Dynasty, reduced the burden of corvee and labor for farmers, and paid attention to the development of agricultural production. During the Wenjing period, frugality was advocated, and "educating the people with morality" was emphasized. The society was relatively stable and the economy developed. It has always been regarded as the "prosperous time" of feudal society and is called "the rule of culture and scenery" in history.