Beijing Cheng is a joint PhD candidate in Public Health at Southeast University, currently undertaking a visiting research placement at the National Centre for Epidemiology and Population Health (NCEPH), Australian National University, from July 2025 to June 2026. His research focuses on the health impacts of environmental exposures, including per- and polyfluoroalkyl substances (PFASs), ambient temperature, and air pollution. During his time at NCEPH, he will work on two main projects: (1) investigating the mediating role of metabolomics in the relationship between PFAS exposure and blood lipid profiles in older adults, and (2) exploring the effects of ambient meteorological factors on health outcomes using distributed lag non-linear models (DLNM) and Bayesian kernel machine regression (BKMR). He has published several first-author papers in Environmental International, Science of the Total Environment, and Ecotoxicology and Environmental Safety. He has received several academic honors and competitive scholarships, including the National Scholarship (China’s highest academic award for graduate students), the Jiangsu Graduate Innovation Project Grant (KYCX23_0333), and CSC sponsorship for the PhD joint training program. He currently serves as an editor for BMC Geriatrics.