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\textbf{What are the additional ways in which the paper could be improved:} I think the problem is important and the proposed sulution is reasonable, with some incremental novelties. The clip-based output is a good display mode in the application. However, I have several questions and list them below.  \begin{quote}  1. The references are not enough. Most recent related works, such as ReID papers in CVPR2014,15, are not included.  \end{quote}  \textit{Hmm, indeed. We thank you for calling our attention to this. We have added some references and now have four 2014 papers, two of those from CVPR, and seven 2015 CVPR papers.}  2. In Chapter 2, the organization could be improved. The two main parts are the taxonomy and the overview, which should be distinguished clearly or split into two subsections. What's more, there's no analysis after the taxonomy. And what's this taxonomy used for?