Thanks so much for your positive feedback! We're very glad to hear that you found the report interesting and informative. It's encouraging to know that it contributes to a deeper understanding of the physics and chemistry at the atmosphere-space boundary. We appreciate your kind words! We have revised this manuscript significantly according to the reviewers's helpful suggestions and comments. We hope our research results will help in understanding the atmospheric metal layer.

Thanks very much for the reviewer’s patience and helpful suggestions and comments. The manuscript has been revised according to the reviewer’s comments. The response to Reviewer #1 is put in the Supplement.

Thanks very much for the reviewer’s patience and helpful suggestions and comments. The manuscript has been revised according to the reviewer’s comments. The response to Reviewer #2 is put in the Supplement.