Dear Dr. Pan,

Thank you for your interests to HESS. Now we received two expert reviews. Both acknowledged the significance of the work, but one reviewer questioned about the novelty of the work. Please keep these in mind when revising your manuscript and I am looking forward to receiving a thoroughly revised manuscript.

Yours sincerely,
Lixin Wang

Dear Dr. Pan,

Thank you for your revision. We will seek advice from the original reviewers regarding the changes and will get back to you soon.

Yours sincerely,
Lixin Wang

Dear Dr. Pan,

Thank you for your revision. We received reviews back from the two original reviewers and the opinions are split. Reviewer#1 is supportive but suggested improvements in English. Reviewer#2 doesn't think you made substantial changes and has serious concerns with the novelty aspect, which I concur. As such, I would let you to decide whether you are able to address the reviewers' comments in a satisfactory manner and resubmit the manuscript. Thank you.

Regards,
Lixin Wang

Dear Dr. Pan,

We received feedbacks from the two original reviewers. Overall the reviewers think the authors did a good job summarizing the earlier work to emphasize the novelty of this work. The reviewer#2 suggested adding more discussion materials to highlight the shortcomings and expand what we learned from the current study to a broader scope. I think this could be done with a modest revision. Also please further improve the presentation quality of this manuscript as both reviewers didn't rank this category high and I concur with reviewers' evaluations.

Thank you for your interests to HESS and I look forward to receiving a revised version of this manuscript.

Regards,
Lixin Wang