On November 7, 2024, Ni Yuqing's postdoctoral thesis opening report "Theoretical Simulation of Ultrafast Spectroscopy" was unanimously recognized by experts on site. Ultrafast spectroscopy such as femtosecond transient absorption, two-dimensional infrared spectroscopy, ultrafast Raman spectroscopy, etc. can detect the dynamic processes of molecules, materials or biological systems through extremely short pulsed light, and provide experimental basis for revealing ultrafast phenomena such as photoinduced charge transfer, energy relaxation, and chemical bond breaking. However, experimental data often contain complex signal superpositions, which require theoretical simulations for quantitative analysis and mechanism interpretation. In the coming time, Yuqing will work closely with laboratory members to combine theoretical simulations with ultrafast experiments to reveal ultrafast dynamics, molecular interactions and structural properties in complex liquids.