01/2015-06/2015, M2R, supervised by Hervé Chauris and me. Very motivated and strong in physics, Hao worked on time-lapse seismic migration. His results helped us understand the issues, especially for the localised waveform inversion that Shihao Yuan and I developed over time. Hao continued working on the subject in the presence of a highly attenuating layer with Hervé and defended his PhD in 2019. He currently works at CGG.