Dr. Linjin Zheng is a research scientist at the Institute for Fusion Studies, The University of Texas at Austin (USA). He is a theoretical physicist for controlled thermonuclear fusion plasmas. He earned his MS degree from The University of Science and Technology of China and PhD from Institute of Physics - Beijing, Chinese Academy of Sciences. He has published more than 100 scientific papers in Physics Review Letters, Physics Letters, Nuclear Fusion, Physics of Plasmas, and at major conferences. He edited one book and authored five more, covering ideal and resistive MHD, multifluids, and kinetic theories. Dr. Zheng's major contributions with his colleagues include the reformulation of gyrokinetic theory, renormalization of Lie transform theory, development of perpendicular magnetohydrodynamic theory, invention of the free boundary ballooning representation, solution of the X point equilibrium, discoveries of the second toroidal Alfvén eigenmodes and the current interchange tearing modes, etc. With his colleagues, he also developed the tokamak equilibrium code ATEQ and stability codes AEGIS and AEGIS-K.