The Experimental Advanced Superconducting Tokamak (EAST, internal designation HT-7U) is an experimental superconducting tokamak magnetic fusion energy reactor in Hefei, the capital city of Anhui Province, in eastern China. The experiment is being conducted by the Hefei-based Institute of Plasma Physics under the Chinese Academy of Sciences. It has operated since 2006.

East is a noun, adjective, or adverb indicating direction or geography. East is one of the four cardinal directions or compass points. It is the opposite of west and is perpendicular to north and south.