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n={a:c._goInner(t.a),b:c._goInner(t.b),p:c._goInner(t.p),o:c._goInner(t.o),q:c._goInner(t.q),d:c._goInner(t.d)};n.a&&(n.a.match(/^[+\-]/)&&(n.a="{"+n.a+"}"),e+=n.a+"\\,"),(n.b||n.p)&&(e+="{\\vphantom{X}}",e+="^{\\hphantom{"+(n.b||"")+"}}_{\\hphantom{"+(n.p||"")+"}}",e+="{\\vphantom{X}}",e+="^{\\smash[t]{\\vphantom{2}}\\mathllap{"+(n.b||"")+"}}",e+="_{\\vphantom{2}\\mathllap{\\smash[t]{"+(n.p||"")+"}}}"),n.o&&(n.o.match(/^[+\-]/)&&(n.o="{"+n.o+"}"),e+=n.o),"kv"===t.dType?((n.d||n.q)&&(e+="{\\vphantom{X}}"),n.d&&(e+="^{"+n.d+"}"),n.q&&(e+="_{\\smash[t]{"+n.q+"}}")):"oxidation"===t.dType?(n.d&&(e+="{\\vphantom{X}}",e+="^{"+n.d+"}"),n.q&&(e+="{\\vphantom{X}}",e+="_{\\smash[t]{"+n.q+"}}")):(n.q&&(e+="{\\vphantom{X}}",e+="_{\\smash[t]{"+n.q+"}}"),n.d&&(e+="{\\vphantom{X}}",e+="^{"+n.d+"}"));break;case"rm":e="\\mathrm{"+t.p1+"}";break;case"text":t.p1.match(/[\^_]/)?(t.p1=t.p1.replace(" ","~").replace("-","\\text{-}"),e="\\mathrm{"+t.p1+"}"):e="\\text{"+t.p1+"}";break;case"roman numeral":e="\\mathrm{"+t.p1+"}";break;case"state of aggregation":e="\\mskip2mu "+c._goInner(t.p1);break;case"state of aggregation subscript":e="\\mskip1mu "+c._goInner(t.p1);break;case"bond":if(!(e=c._getBond(t.kind_)))throw["MhchemErrorBond","mhchem Error. Unknown bond type ("+t.kind_+")"];break;case"frac":var o="\\frac{"+t.p1+"}{"+t.p2+"}";e="\\mathchoice{\\textstyle"+o+"}{"+o+"}{"+o+"}{"+o+"}";break;case"pu-frac":var a="\\frac{"+c._goInner(t.p1)+"}{"+c._goInner(t.p2)+"}";e="\\mathchoice{\\textstyle"+a+"}{"+a+"}{"+a+"}{"+a+"}";break;case"tex-math":e=t.p1+" ";break;case"frac-ce":e="\\frac{"+c._goInner(t.p1)+"}{"+c._goInner(t.p2)+"}";break;case"overset":e="\\overset{"+c._goInner(t.p1)+"}{"+c._goInner(t.p2)+"}";break;case"underset":e="\\underset{"+c._goInner(t.p1)+"}{"+c._goInner(t.p2)+"}";break;case"underbrace":e="\\underbrace{"+c._goInner(t.p1)+"}_{"+c._goInner(t.p2)+"}";break;case"color":e="{\\color{"+t.color1+"}{"+c._goInner(t.color2)+"}}";break;case"color0":e="\\color{"+t.color+"}";break;case"arrow":var r={rd:c._goInner(t.rd),rq:c._goInner(t.rq)},i="\\x"+c._getArrow(t.r);r.rq&&(i+="[{"+r.rq+"}]"),e=i+=r.rd?"{"+r.rd+"}":"{}";break;case"operator":e=c._getOperator(t.kind_);break;case"1st-level escape":e=t.p1+" ";break;case"space":e=" ";break;case"entitySkip":case"pu-space-1":e="~";break;case"pu-space-2":e="\\mkern3mu ";break;case"1000 separator":e="\\mkern2mu ";break;case"commaDecimal":e="{,}";break;case"comma enumeration L":e="{"+t.p1+"}\\mkern6mu ";break;case"comma enumeration M":e="{"+t.p1+"}\\mkern3mu ";break;case"comma enumeration S":e="{"+t.p1+"}\\mkern1mu ";break;case"hyphen":e="\\text{-}";break;case"addition compound":e="\\,{\\cdot}\\,";break;case"electron dot":e="\\mkern1mu \\bullet\\mkern1mu ";break;case"KV x":e="{\\times}";break;case"prime":e="\\prime ";break;case"cdot":e="\\cdot ";break;case"tight cdot":e="\\mkern1mu{\\cdot}\\mkern1mu ";break;case"times":e="\\times ";break;case"circa":e="{\\sim}";break;case"^":e="uparrow";break;case"v":e="downarrow";break;case"ellipsis":e="\\ldots ";break;case"/":e="/";break;case" / ":e="\\,/\\,";break;default:throw["MhchemBugT","mhchem bug T. Please report."]}return e},_getArrow:function(t){switch(t){case"->":case"\u2192":case"\u27f6":return"rightarrow";case"<-":return"leftarrow";case"<->":return"leftrightarrow";case"<--\x3e":return"rightleftarrows";case"<=>":case"\u21cc":return"rightleftharpoons";case"<=>>":return"rightequilibrium";case"<<=>":return"leftequilibrium";default:throw["MhchemBugT","mhchem bug T. Please report."]}},_getBond:function(t){switch(t){case"-":case"1":return"{-}";case"=":case"2":return"{=}";case"#":case"3":return"{\\equiv}";case"~":return"{\\tripledash}";case"~-":return"{\\mathrlap{\\raisebox{-.1em}{$-$}}\\raisebox{.1em}{$\\tripledash$}}";case"~=":case"~--":return"{\\mathrlap{\\raisebox{-.2em}{$-$}}\\mathrlap{\\raisebox{.2em}{$\\tripledash$}}-}";case"-~-":return"{\\mathrlap{\\raisebox{-.2em}{$-$}}\\mathrlap{\\raisebox{.2em}{$-$}}\\tripledash}";case"...":return"{{\\cdot}{\\cdot}{\\cdot}}";case"....":return"{{\\cdot}{\\cdot}{\\cdot}{\\cdot}}";case"->":return"{\\rightarrow}";case"<-":return"{\\leftarrow}";case"<":return"{<}";case">":return"{>}";default:throw["MhchemBugT","mhchem bug T. Please report."]}},_getOperator:function(t){switch(t){case"+":return" {}+{} ";case"-":return" {}-{} ";case"=":return" {}={} ";case"<":return" {}<{} ";case">":return" {}>{} ";case"<<":return" {}\\ll{} ";case">>":return" {}\\gg{} ";case"\\pm":return" {}\\pm{} ";case"\\approx":case"$\\approx$":return" {}\\approx{} ";case"v":case"(v)":return" \\downarrow{} ";case"^":case"(^)":return" \\uparrow{} ";default:throw["MhchemBugT","mhchem bug T. Please report."]}}}}]).default});
\ No newline at end of file
diff --git a/exampleSite/config.toml b/exampleSite/config.toml
index 925d4d64..428ac2a8 100644
--- a/exampleSite/config.toml
+++ b/exampleSite/config.toml
@@ -133,8 +133,18 @@ dateFormatToUse = "2006-01-02"
   # public git repo url to link lastmod git commit only then enableGitInfo is true
   gitRepo = ""
 
-  # whether to render mathematical formulas
-  math = true
+  # mathematical formulas (KaTeX)
+  [params.math]
+    enable = true
+    block_left_delimiter = ""
+    block_right_delimiter = ""
+    inline_left_delimiter = "$"
+    inline_right_delimiter = "$"
+    # KaTeX extension copy_tex
+    copy_tex = true
+    # KaTeX extension mhchem
+    mhchem = true
+
   # whether to show link to Raw Markdown content of the post
   linkToMarkdown = true
 
@@ -159,6 +169,9 @@ dateFormatToUse = "2006-01-02"
     katex_css = ''
     katex_js = ''
     katex_auto_render_js = ''
+    katex_copy_tex_css = ''
+    katex_copy_tex_js = ''
+    katex_mhchem_js = ''
     mermaid_js = ''
     echarts_js = ''
     echarts_macarons_js = ''
diff --git a/exampleSite/zh/config.toml b/exampleSite/zh/config.toml
index beee52fe..b2c9c725 100644
--- a/exampleSite/zh/config.toml
+++ b/exampleSite/zh/config.toml
@@ -133,8 +133,18 @@ dateFormatToUse = "2006-01-02"
   # 用于生成文章上次修改时间的公共 git 仓库路径，仅在 enableGitInfo 设为 true 时有效
   gitRepo = ""
 
-  # 是否渲染数学公式
-  math = true
+  # 数学公式 (KaTeX https://katex.org/)
+  [params.math]
+    enable = true
+    block_left_delimiter = ""
+    block_right_delimiter = ""
+    inline_left_delimiter = "$"
+    inline_right_delimiter = "$"
+    # KaTeX 插件 copy_tex
+    copy_tex = true
+    # KaTeX 插件 mhchem
+    mhchem = true
+
   # 是否在文章页面显示原始 Markdown 文档链接
   linkToMarkdown = true
 
@@ -159,6 +169,9 @@ dateFormatToUse = "2006-01-02"
     katex_css = ''
     katex_js = ''
     katex_auto_render_js = ''
+    katex_copy_tex_css = ''
+    katex_copy_tex_js = ''
+    katex_mhchem_js = ''
     mermaid_js = ''
     echarts_js = ''
     echarts_macarons_js = ''
diff --git a/exampleSite/zh/content/posts/test.md b/exampleSite/zh/content/posts/test.md
index 513d81ec..ac4ff27c 100644
--- a/exampleSite/zh/content/posts/test.md
+++ b/exampleSite/zh/content/posts/test.md
@@ -314,3 +314,9 @@ int a = 1;
 $$ c = \pm\sqrt{a^2 + b^2} $$
 
 Left \\( c = \pm\sqrt{a^2 + b^2} \\) Right
+
+Left $ c = \pm\sqrt{a^2 + b^2} $ Right
+
+$ \ce{CO2 + C -> 2 CO} $
+
+$ \ce{Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2-} $
diff --git a/layouts/partials/scripts.html b/layouts/partials/scripts.html
index cef38534..9b7ca197 100644
--- a/layouts/partials/scripts.html
+++ b/layouts/partials/scripts.html
@@ -54,7 +54,8 @@
 {{- end -}}
 
 {{- /* KaTeX https://github.com/KaTeX/KaTeX */ -}}
-{{- if .Site.Params.math | and (ne .Params.math false) -}}
+{{- if .Site.Params.math.enable | and (ne .Params.math false) -}}
+    {{- $math := .Site.Params.math -}}
     {{- $katex_css := "" -}}
     {{- if eq (getenv "HUGO_ENV") "production" | and .Site.Params.cdn.katex_css -}}
         {{- $katex_css = .Site.Params.cdn.katex_css -}}
@@ -74,10 +75,54 @@
         {{- $katex_auto_render_js = .Site.Params.cdn.katex_auto_render_js -}}
     {{- else -}}
         {{- $res := resources.Get "js/lib/katex/auto-render.min.js" -}}
-        {{- $katex_auto_render_js = printf "<script defer src=\"%s\" onload=\"renderMathInElement(document.body);\"></script>" $res.RelPermalink -}}
+        {{- $katex_auto_render_js = printf "<script defer src=\"%s\"></script>" $res.RelPermalink -}}
     {{- end -}}
     {{- $katex := delimit (slice $katex_css $katex_js $katex_auto_render_js) "" -}}
+    {{- if $math.copy_tex -}}
+        {{- $katex_copy_tex_css := "" -}}
+        {{- if eq (getenv "HUGO_ENV") "production" | and .Site.Params.cdn.katex_copy_tex_css -}}
+            {{- $katex_copy_tex_css = .Site.Params.cdn.katex_copy_tex_css -}}
+        {{- else -}}
+            {{- $res := resources.Get "css/lib/katex/copy-tex.min.css" -}}
+            {{- $katex_copy_tex_css = printf "<link rel=\"stylesheet\" href=\"%s\">" $res.RelPermalink -}}
+        {{- end -}}
+        {{- $katex_copy_tex_js := "" -}}
+        {{- if eq (getenv "HUGO_ENV") "production" | and .Site.Params.cdn.katex_copy_tex_js -}}
+            {{- $katex_copy_tex_js = .Site.Params.cdn.katex_copy_tex_js -}}
+        {{- else -}}
+            {{- $res := resources.Get "js/lib/katex/copy-tex.min.js" -}}
+            {{- $katex_copy_tex_js = printf "<script defer src=\"%s\"></script>" $res.RelPermalink -}}
+        {{- end -}}
+        {{- $katex = delimit (slice $katex $katex_copy_tex_css $katex_copy_tex_js) "" -}}
+    {{- end -}}
+    {{- if $math.mhchem -}}
+        {{- $katex_mhchem_js := "" -}}
+        {{- if eq (getenv "HUGO_ENV") "production" | and .Site.Params.cdn.katex_mhchem_js -}}
+            {{- $katex_mhchem_js = .Site.Params.cdn.katex_mhchem_js -}}
+        {{- else -}}
+            {{- $res := resources.Get "js/lib/katex/mhchem.min.js" -}}
+            {{- $katex_mhchem_js = printf "<script defer src=\"%s\"></script>" $res.RelPermalink -}}
+        {{- end -}}
+        {{- $katex = delimit (slice $katex $katex_mhchem_js) "" -}}
+    {{- end -}}
     {{- $katex | safeHTML -}}
+    <script>
+        document.addEventListener("DOMContentLoaded", function () {
+            renderMathInElement(document.body, {
+                delimiters: [
+                    { left: "$$", right: "$$", display: true },
+                    { left: "\\(", right: "\\)", display: false },
+                    { left: "\\[", right: "\\]", display: true },
+                    {{- if and $math.block_left_delimiter $math.block_right_delimiter -}}
+                        { left: "{{ $math.block_left_delimiter }}", right: "{{ $math.block_right_delimiter }}", display: true },
+                    {{- end -}}
+                    {{- if and $math.inline_left_delimiter $math.inline_right_delimiter -}}
+                        { left: "{{ $math.inline_left_delimiter }}", right: "{{ $math.inline_right_delimiter }}", display: false },
+                    {{- end -}}
+                ]
+            });
+        });
+    </script>
 {{- end -}}
 
 {{- /* mermaid https://github.com/knsv/mermaid */ -}}