The authors have appropriately addressed the comments of the two anonymous referees and they have modified their manuscript accordingly. However, many alterations and corrections are needed for the Main text and Supplement before the manuscript can be published in ACP.

For the Main text:
Line 16: Replace "over years" by "over the years".
Line 23: Replace "in two" by "in the two".
Line 25: Replace "than in" by "compared to".
Line 30: Replace "with that" by "with those".
Lines 30-31: Replace "averagely contributed" by "contributed, on average,".
Line 32: Replace "76% of" by "76% of the".
Lines 50 and 51: Replace "Noziere" by "Nozière".
Line 50: Replace "organic matters in SOA are" by "organic matter in SOA is".
Lines 63, 272, and 540: Replace "Gomez-Gonzalez" by "Gómez-González".
Line 67: Replace "of OS" by "of the OS" and replace "in ambient" by "in the ambient".
Line 76: Replace ", which can" by " and can".
Line 79: Replace "In atmospheric" by "In the atmospheric".
Line 87: Replace "react with" by "react with the".
Line 88: Replace "in ambient" by "in the ambient".
Line 89: Abbreviations and acronyms, here OM, should be defined (written full-out) when first used. Thus, replace "OM" by "organic mass (OM)".
Line 113: Replace "same or similar with" by "same as or similar to".
Line 117: Replace "Up to date" by "Up to now".
Line 122: Abbreviations and acronyms, here UPLC-ESI-QToF-MS, should be defined (written full-out) when first used in the Main text (outside of the Abstract). I suggest replacing "UPLC-ESI-QToF-MS" here by "an ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometer equipped with an electrospray ionization (ESI) source (UPLC-ESI-QToF-MS)".
Line 125: Replace "were probed" by "were investigated".
Line 145: Replace "waters" by "Waters".
Line 154: Abbreviations and acronyms, here MS/MS, should be defined (written full-out) when first used. I suggest replacing "MS/MS" here by "tandem mass spectrometry (MS/MS)"; as a consequence, in lines 161-162, "tandem mass spectrometry (MS/MS)" should the be replaced by "MS/MS".
Line 158: Replace ")were" by ") were".
Line 167: Replace "by Shanghai" by "by the Shanghai".
Line 173: Replace "were analyzed" by "were determined".
Line 199: Replace "of OS" by "of the OS".
Line 201: Replace "from LC" by "from the LC".
Line 213: Replace "in two years" by "in the two years".
Line 232: Replace "Figure 3a, b show" by "Figure 3a and b show".
Line 234: Replace "than CHO" by "than the CHO".
Line 236: Replace "and a few" by "and for a few".
Line 240: Replace "to observed" by "to the observed".
Line 242: Replace "species were significantly" by "species was significantly".
Line 244: Replace "to biogenic" by "to that of biogenic".
Line 255: Replace "originate from" by "originates from".
Line 259: Replace "with that in" by "as in".
Line 262: Replace "of identified" by "of the identified".
Line 263: Replace ", in polluted" by " in polluted".
Line 265: Replace "signals were not" by "signals was not".
Line 285: Replace "in two" by "in the two".
Line 295: Replace "Isoprene-derived OS" by "The isoprene-derived OS".
Line 313: Replace "Since 2-MT-OS" by "2-MT-OS".
Line 315: Replace "suggests that" by "suggest that".
Line 317: Replace "important SOA" by "important for SOA".
Line 327: Replace "expect for" by "except for".
Line 332: Replace "NOSs" by "NOS".
Line 334: Replace "Monoterpene-derived OS" by "The monoterpene-derived OS".
Line 344: Replace "in two" by "in the two".
Line 350: Replace "Among NOS species, the" by "Among the NOS species,".
Line 353: Replace "than observed" by "than that observed".
Lines 358-359: Replace "Although the" by "Although".
Line 363: Replace "NOS species" by "the NOS species".
Line 370: Replace "were quantified. The inter-annual variations of" by "was quantified. The inter-annual variation of".
Line 371: Replace "to biogenic OS" by "to the biogenic OS one".
Line 372: Replace "Among quantified OSa, the" by "Among the quantified OSa,".
Line 375: Replace "time with the" by "time as the".
Line 388: Replace "species averagely accounted for 19% of" by "species accounted, on average, for 19% of the".
Line 396: Replace "with those observed" by "with that observed".
Line 403: Replace "2019). The" by "2019).".
Line 403-404: Replace "most of" by "most of the".
Line 410: Replace "0.88). The" by "0.88).".
Line 411: Replace "2017), which was strongly correlated with the" by "2017); it was strongly correlated with".
Line 413: Replace "GA, where the" by "GA, where" and replace "most of" by "most of the".
Line 415: Replace "concentrations of" by "concentrations of the".
Line 432: Replace "seasons were also" by "seasons was also".
Line 435: Replace "that most" by "where most".
Line 437: Replace "that that the" by "that the".
Line 446: Replace "6, OS" by "6, the OS".
Line 458: Replace "of ion" by "of the ion".
Line 464: Replace "on average accounted" by "accounted, on average,".
Line 470: Replace "on average contributed to 19% of the concentration of quantified OS species. The" by "contributed, on average, to 19% of the concentration of the quantified OS species.".
Line 472: Replace "76% of" by "76% of the".
Line 474: Replace "implies that" by "imply that".
Line 490: Replace "of CHOS signals that arose mainly from anthropogenic sources were" by "of the CHOS signals that arose mainly from anthropogenic sources was".
Lines 509-510, 647, and 757-759: Titles of journal articles should be in lower case, not in Title Case.
Lines 627-628: Replace "amp,apos, Dowd" by "O'Dowd".
Line 638: Replace "88," by "88, 3319-3322,".
Lines 683, 762, 764, and 806: For references with only 2 authors, there should be no comma before the "and" preceding the second author. Note that for references with 3 or more authors, there should be a comma before the "and" preceding the last author.
Line 709: Replace "117," by "117, D01207,".
Line 714: Replace "Kaberer" by "Kalberer".
Lines 714-719: "Noziere et al., 2015" should come after "Noziere et al., 2010".
Line 719: Replace "37," by "37, L05806,".
Line 796: Replace "8345" by "36, 8345".
Line 813: Replace "224," by "224, 117180,".
Line 818: Replace "724," by "724, 138134,".
Line 882: Replace "relative humid" by "relative humidity".
Line 889: Replace "The intensity fraction" by "Intensity fraction".
Line 890: Replace "The number of" by "Number of".
Line 896: Replace "The concentrations of different types of the quantified OS over four" by "Concentrations of different types of the quantified OS over the four".
Line 899: Replace "The quantified" by "Quantified".
Line 905: Replace "The quantified" by "Quantified".
Line 906: Replace "of circles" by "of the circles".
Line 907: Replace "with aerosol" by "with the aerosol".

For the Supplement:
Table S3, first line of heading: Replace "The dates" by "Dates".
Table S3, first line of footnote: Replace "in the parentheses are the concentrations (ppm) of OS" by "in parentheses are the concentrations (ppm) of the OS".
Table S4, first line of heading: Replace "The molecular" by "Molecular".
Figure S1, first line of caption: Remove "The " after "Figure S1".

The following alteration is still needed in the Main text before the manuscript can be published in ACP.
Line 914: Replace "of circles" by "of the circles".