Chen-Ning Frank Yang, also known as Yang Zhenning is a Chinese physicist who works on statistical mechanics and particle physics. He and Tsung-dao Lee received the 1957 Nobel Prize in Physics for their work on parity non conservation of weak interaction.

The two proved theoretically that one of the basic quantum-mechanics laws, the conservation of parity, is violated in the so-called weak nuclear reactions, those nuclear processes that result in the emission of beta or alpha particles. The most important work of Yang is Yang-Mills theory.