Conceptualization, B.Q.; methodology, Z.Z.; supervision, B.Q.; funding acquisition, B.Q.; formal analysis, B.Q. and Z.Z.; investigation, Z.Z. and Z.D.; and writing—original draft, Z.Z. All authors have read and agreed to the published version of the manuscript. This work was supported by the key project of the Social Science Foundation of Hengyang under grant number 2021B(I)004 and the Open Foundation of Hengyang Base of International Centre on Space Technologies for Natural and Cultural Heritage with the auspices of UNESCO under grant number 2021HSKFJJ029.
