Keyu Xia was awarded his doctoral degree of “Optics” by the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences in 2007. He has been a full professor at Nanjing University since 2017. His research interest includes quantum optics and quantum information, in particular, chiral quantum optics. He has published more than 40 peer-reviewed publications. His academic achievements include: (I) proposing the first quantum-state-controlled photon isolator and circulator; (II) proposing a chiral cross-Kerr nonlinear medium to bypass the dynamical reciprocity in nonlinear isolation; (III) experimentally demonstrating the chiral susceptibility-momentum locking as a principle for optical nonreciprocity. Due to his significant contributions to quantum optics and quantum information technology, he was awarded the senior member designation of OSA in 2020.