Thank you. As commented by reviewer, the content of Section 3.1 includes the content of Section 2. However, for the 3.2 Expansion of smart city structure that we want to present, I think it is necessary to organize the contents of Section 2 through Section 3.1 and to draw limitations. Of course, it is also correct to understand the structure as the opinions of reviewer. We put a lot of thought into reflecting the opinions. We are sorry; however, we have decided that it is difficult to change the structure at the moment. We ask for your generous understanding of the current structure.
Section 3.1 gives an overview of the COVID-19 and smart city systems situation in South Korea, but is not part of the novel contribution by the authors. I would thus include it in Section 2 instead. Section 2 would thus have a part on smart city services, a part on COVID-19 response plans, and then the current content of 3.1 which deals with the relationship between the two parts of the current Section 2. It would allow a smoother transition between Section 2 and Section 3, as the modified Section 2 would conclude with the need for a novel smart city service structure.