A team of scientists led by Prof. Qihua Xiong at Tsinghua University was invited by Co-Founding-Editors-in-Chief, Prof. Lei Zhou and Prof. Din Ping Tsai, to contribute a comprehensive review paper entitled "Microcavity exciton polaritons at room temperature", which was published on the first issue of Photonics Insights as " On the Cover". (Sanjib Ghosh, Rui Su, Jiaxin Zhao, Antonio Fieramosca, Jinqi Wu, Tengfei Li, Qing Zhang, Feng Li, Zhanghai Chen, Timothy Liew, Daniele Sanvitto, Qihua Xiong. Microcavity exciton polaritons at room temperature[J]. Photonics Insights, 2022, 1(1): R04)