In various East Asian languages such as Chinese, Japanese, Korean, and Vietnamese, the phrase "Wànsuì", "Banzai", "Manse", and "Vạn tuế", respectively, meaning "myriad years" is used to wish long life, and is typically translated as "Long live" in English. The phrase originated in ancient China as an expression used to wish long life to the emperor. Due to the historical political and cultural influence of Chinese culture on the East Asian cultural sphere, in the area, and in particular of the Classical Chinese language, cognates with similar meanings and usage patterns have appeared in many East Asian languages and Vietnamese. In some countries, this phrase is mundanely used when expressing feeling of triumph, typically shouted by crowds.

Throughout Chinese history, "Emperor" was the superlative title held by the monarchs who ruled various imperial dynasties. In traditional Chinese political theory, the emperor was the "Son of Heaven", an autocrat with the divine mandate right to rule all under Heaven. Emperors were worshiped posthumously under an imperial cult. The lineage of emperors descended from a paternal family line constituted a dynasty, and succession in most cases theoretically followed agnatic primogeniture.