The 3rd International Conference on Advances in Geosciences & Geochemistry (CAGG 2021)will be held in Guilin, China, during June 1-3, 2021. The aim of CAGG 2021 is to provide a stage for researchers, engineers, academicians as well as industrial professionals from all over the world to present their research results and development activities in Biogeochemistry, Environmental geochemistry, Geosciences, Hydrogeochemistry and other related fields.