On April 20, 2024, the first phase of the 2024 Micro Exploration Classroom was held. The speaker of this issue is: Li Yi. The topic is: Basic Principles of Raman Spectroscopy and Data Processing, including the basic principles of Raman spectroscopy, the advantages and functions of Raman spectroscopy, surface-enhanced Raman scattering, polarized Raman, higher harmonics, Raman testing and basic Raman data processing.