Hi all, "Generate PDF-1.7 by default in all formats, both plain and LaTeX; before, it was 1.5." see https://tug.org/texlive/bugs.html
However, it is still 1.5 by XeTeX. Following https://tex.stackexchange.com/q/536254, I add the following line to the preamble \special{pdf:minorversion 7} %set minorversion it produce PDF-1.7 The "XeTeX: \special{pdf:majorversion:1}\special{pdf:minorversion:4}" mentioned in https://tug.org/texlive/bugs.html, may have typos, i.e., the second colon should be replaced by a blank space. Best regards Chen
