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Cheng Kaijia is one of the pioneers of China's nuclear weapons research and has made outstanding contributions in the development and testing of nuclear weapons. He pioneered, planned and led research in the new field of radiation-resistant reinforcement technology. He is one of the pioneers in the new field of directed energy high-power microwave research in China.

Published China's first monograph on solid state physics, proposed the universal thermodynamic internal friction theory, derived the Dirac equation, proposed and developed the superconducting double-band theory and the condensed matter TFDC electron theory. In 1985, he won the special prize of the National Science and Technology Progress Award. In 1999, he was awarded the "Two Bombs and One Satellite" Meritorious Service Medal by the state. In 2013, he won the highest national science and technology award. Extended information

Cheng Kaijia has successively done outstanding work in the rigorous proof of the Dirac equation of free particles and five-dimensional field theory. In 1948, he and his mentor, the famous physicist M. Born also proposed the double-band theory of superconductivity and published many related papers in Nature and other magazines.

Since 1986, Cheng Laijia has further developed and improved the double-band theory of superconductivity, proved the error of BCS's electron pairing theory, published two monographs on superconductivity, and proposed a new theory of condensed matter. The electronic theory is called TFDC (Thomas Fermi Dirac Cheng) theory and has been experimentally verified, providing a new theoretical basis for material performance research and new material design.