PhD, 2011, Royal Insititute of Technology (KTH), Sweden<br>PhD, 2010, Nanjing University<br>BS. 2004, Nanjing University <br><br>My major research interests are theory and simulations of traditional X-ray spectroscopy (XAS, XES, XPS, XPS shake-up, RIXS) and ultrafast nonlinear X-ray spectroscopy (stimulated Raman, four-wave-mixing, etc). The work is carried out by combing quantum chemistry, solid state physics, molecular dynamics, and nonlinear optics. The most suitable, available electron structure and dynamical methods are chosen in spectroscopy studies. The theoretical studies aim not only to explain the experimental results, but also to suggest new time-resolved nonlinear x-ray experiments for x-ray free electron (XFEL) facilities. I develop in-house codes for spectroscopic calculations at the density functional theory and multi-configurational levels, taking advantage of the integrals and wave functions read from common quantum chemistry softwares. The research is conducted via three directions: (A) Ultrafast nonlinear X-ray Spectroscopy; (B) X-ray Spectroscopy of Nano-materials; (C) X-ray Spectroscopy of Bio-molecules.