In a final re-review of your manuscript, one reviewer had a final point which is noted below, and represents a minor revision. Once this is addressed the manuscript can be accepted:

"the authors need to carefully use the OPs because they include the primary and secondary organic particles. These both particles have total different morphology. The last part of in this study, I might suggest that the authors think about the primary organic particles. In one recent study, the authors found lots of burning-related particles: spherical organic particles which have been identified by tarball in Beijing hazes (Persistent residential burning-related primary organic particles during wintertime hazes in North China: insights into their aging and optical changes. Atmos. Chem. Phys. 2021, 21, (3), 2251-2265.). These particles can be important marker to represent the coal burning instead you mentioned all the OPs."