The term "National Day" originally refers to a national celebration, which was first seen in the Western Jin Dynasty. Lu Ji, a writer in the Western Jin Dynasty, once recorded in the article "On the Five Permanent Members" that "the National Day is only beneficial, and the main worry is not harmful". In the feudal era of our country, the great events celebrated by the whole country were nothing more than the emperor's accession to the throne and his birthday (the Qing Dynasty called the emperor's birthday Long live the festival). Therefore, in ancient China, the emperor's accession to the throne and birthday were called "National Day". Today, the National Day is called National Day.