This is makeindex, version 2.15 [TeX Live 2020/W32TeX] (kpathsea + Thai support).
Scanning input file thesis-china.idx....done (6 entries accepted, 0 rejected).
Sorting entries....done (19 comparisons).
Generating output file thesis-china.ind....done (21 lines written, 0 warnings).
Output written in thesis-china.ind.
Transcript written in thesis-china.ilg.