<p>Condensable particulate matter (CPM) emitted from stationary combustion and mobile sources exhibits high emissions and a large proportion of organic components. However, CPM is not generally measured when conducting emission surveys of PM in most countries, including China. Consequently, previous emission inventories have not included emission rates for CPM. Here we construct an emission inventory of CPM in China with a focus on organic aerosols (OA) based on collected CPM emission information. Results show that OA emissions are enhanced twofold after the inclusion of CPM in a new China inventory for the years 2014 and 2017. Considering organic CPM emissions and model representations of secondary OA (SOA) formation from CPM, here a series of sensitivity cases have been simulated using the three-dimensional Community Multiscale Air Quality (CMAQ) model to estimate the contributions of CPM emissions to atmospheric OA and fine PM (PM<sub>2.5</sub>) concentrations in China. Compared with observations during a haze episode from October 14 to November 14, 2014, at a Beijing site, estimates of temporal average primary OA (POA) and SOA concentrations are greatly improved after including the CPM effects. These scenarios demonstrated the significant contributions of CPM emissions from stationary combustion and mobile sources to POA (53 ~ 86 %), SOA (48 ~ 67 %), and total OA concentrations (50 ~ 78 %). Furthermore, contributions of CPM emissions to total OA concentrations were demonstrated over the major 2+26 cities of Beijing-Tianjin-Hebei region (BTH2+26 cities) in December 2018, with average contributions up to 55 %, 58 %, 60 %, and 57 % for Handan, Shijiazhuang, Xingtai, and Dezhou, respectively. Correspondingly, the inclusion of CPM emissions also narrowed the gap between simulated and observed PM<sub>2.5</sub> concentrations over the BTH2+26 cities. These results improve the simulation performance of atmospheric OA and PM<sub>2.5</sub>, and may provide important implications for the sources of OA.</p>