The Earth and Environmental Systems Research Facility (EESRF) is one of the core research facilities focusing on natural sciences at the Hong Kong University of Science and Technology (Guangzhou). It is equipped with advanced research equipment and experimental instruments, featuring the testing of various environmental isotopes. Since its establishment, it has been committed to supporting the research on the land-ocean-atmosphere integrated earth system and providing support for research institutions in the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) in their research on environmentally sustainable development under climate change. The laboratory also provides professional isotope analysis and testing services.