return {
	s(
		";updarkmode",
		t({
			"\\usepackage{xcolor}",
			"\\pagecolor[rgb]{0.1,0.1,0.1}",
			"\\color[rgb]{1,1,1}",
		})
	),
	s(";upurlpackage", t("\\usepackage{hyperref}")),

	-- % https://old.reddit.com/r/LaTeX/comments/m8frij/aligning_text_across_lines/
	-- % allign dates in working experience
	-- for \brlap or \stackunder or \bllap
	s(";upstack", t("\\usepackage{stackengine}")),
	-- % for \CurrentLineWidth
	s(";uptabto", t("\\usepackage{tabto}")),

	-- % https://tex.stackexchange.com/questions/5036/how-to-prevent-latex-from-hyphenating-the-entire-document
	-- % disable hyphenation at the edge
	s(";upnohyphen", t("\\usepackage[none]{hyphenat}")),

	s(";upinpututf8", t("\\usepackage[utf8]{inputenc}")),

	s(";up", fmta("\\usepackage[<>]{<>}", { i(2), i(1) })),

	-- Help using xeCJK
	-- https://tex.stackexchange.com/questions/510853/using-one-xecjk-font-family-on-english-and-chinese-at-the-same-time
	-- https://tex.stackexchange.com/questions/264265/defining-subfamilies-for-a-font/264275#264275
	s(
		";upxecjk",
		fmta(
			[[
    \usepackage[AutoFallBack=true]{xeCJK}
    \setCJKmainfont<>
    ]],
			{
				c(1, {
					t({
						"{Source Han Serif TC}",
						"\\newCJKfontfamily\\secondaryfont{Source Han Sans TC}",
						"\\newcommand*{\\sfont}[1]{{\\secondaryfont #1}}",
					}),
					t({
						"{Source Han Sans TC}",
						"\\newCJKfontfamily\\secondaryfont{Source Han Serif TC}",
						"\\newcommand*{\\sfont}[1]{{\\secondaryfont #1}}",
					}),
					t({
						"[Path=\\string~/.local/share/fonts/",
						",UprightFeatures = {FontIndex=13}",
						",BoldFeatures    = {FontIndex=28}",
						"]{SourceHanSerif.ttc}",
						"\\newCJKfontfamily[Path=\\string~/.local/share/fonts/",
						"  ,UprightFeatures = {FontIndex=28}",
						"  ,BoldFeatures    = {FontIndex=38}",
						"]\\secondaryfont{Source Han Sans TC}",
						"\\newcommand*{\\sfont}[1]{{\\secondaryfont #1}}",
					}),
					t({
						"[Path=\\string~/.local/share/fonts/",
						",UprightFeatures = {FontIndex=28}",
						",BoldFeatures    = {FontIndex=38}",
						"]{SourceHanSans.ttc}",
						"\\newCJKfontfamily[Path=\\string~/.local/share/fonts/",
						",UprightFeatures = {FontIndex=13}",
						",BoldFeatures    = {FontIndex=28}",
						"]\\secondaryfont{Source Han Serif TC}",
						"\\newcommand*{\\sfont}[1]{{\\secondaryfont #1}}",
					}),
				}),
			}
		)
	),
}