What is Yao Shun's idiom?

"Shun Sun in the Year of Yao" is an idiom of China, which means that the world is at peace. Four Seasons White from Southern Yue? Song dynasty: "I admire Yao Cao's existence, and his grandson is happy with the year."

Yao (about 2377- 2259 BC) was born in ancient China (now Yaodu District, Linfen, Shanxi, formerly known as Hedong District). China was the leader of the ancient League of Nations and one of the "Five Emperors". Yao is his son and his mother is Chen. 13-year-old Tao (Xiangfen Village, Shanxi Province). At the age of fifteen, he assisted his younger brother Di Zhi, and in the Tang Dynasty (now Yicheng, Shanxi Province), he changed his name to Taotang History. At the age of twenty, Yao became the son of heaven and made Pingyang his capital. Yao Li has been successful for seventy years. Twenty years later, Yao Lao and Shun succeeded Yao in power. Yao died twenty-eight years later and was buried in Gulin (Juancheng County, Shandong Province). Yao inherited the throne from his brother Di Zhi and abdicated to Shun.

He ordered He to determine and deduce the calendar, set the age at four o'clock, and reward the people with farming time. The vernal equinox, summer solstice, autumn equinox and winter solstice are determined. Yao set up the drum of advice and let everyone in the world do their best; Build a tree of slander and let people all over the world attack his mistakes.