Sacrifice to Heaven (Jitian 祭天) is the worship of Shangdi originating in China. In Ancient Chinese society, nobles of all levels constructed altars for Heaven. At first only nobles could worship Shangdi but later beliefs changed and everyone could worship Shangdi.
Modern Confucian organizations offer this practice to all their followers, and it's still observed in China even though there is no monarch. This tradition has also had an impact on other countries such as Japan, Vietnam, and Korea. The Chinese word "Jì" (祭) in the name of this practice is the same word as "Jesa" in Korean.
