Introduction to the Earth Sacrifice Altar: The Earth Sacrifice Altar was used by Qin Shihuang to worship the gods of heaven and earth. Taishan Fengchan is a ceremony in which ancient emperors offered sacrifices to heaven and earth. Building an altar of earth on Mount Tai to offer sacrifices to heaven is called "Feng"; worshiping earth on Mount Liangfu at the foot of Mount Tai is called "Zen".