LI Hongzhong,chemical engineer, was elected Member of the Chinese Academy of Sciences in 2005. He proposed the theory and method of the particularization of gas-solids fluidization. He developed the theory of the meso-scale structure and the relationship between meso-scale structure and transfer rate in gas-solids fluidized beds. He also established the theory of non-fluidized gas-solid two-phase flow. He promoted many applications of fluidization technology in the chemical engineering and metallurgy industries.