Conceptualization, J.H. and C.F.; Methodology, C.F.; Software, C.F.; Data curation, Z.W.; Writing—original draft, C.F.; Writing—review & editing, J.H.; Supervision, J.H., J.R. and S.W.; Project administration, Z.W. and J.R.; Funding acquisition, J.H. and S.W. All authors have read and agreed to the published version of the manuscript. This research received no external funding.