In a recent article published in Nature, a research team led by Prof. Chen Xianhui, Wu Tao and Wang Zhenyu from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences found the key evidence for phase transition in a kagome superconductor CsV3Sb5. At a low temperature, the team observed a transition from charge-density-wave (CDW) order to electronic nematicity which was firstly described by a three-state Potts model.