Boji’s paper entitled ‘Inventory Uncertainty and Transboundary Transport of Biomass-Burning Black Carbon in Southern China: Insights from Combining Radiocarbon Measurements with Modeling‘ was published in ES&T. This contribution combined the PKU GEM inventory-transport modelling with radiocarbon analysis of black carbon (BC) looking at emissions and transport of biomass burning BC in/to the Pearl River Delta. Congratulations!