Fix Chinese PDF generation issue

docs/conf.py

@@ -32,3 +32,24 @@ extensions = [
     'sphinx.ext.todo',
     'sphinx.ext.mathjax',
 ]
+
+latex_elements = {
+    # Additional stuff for the LaTeX preamble, to generate Chinese correctly.
+    'preamble':
+    r'''
+        \hypersetup{unicode=true}
+        \usepackage{CJKutf8}
+        \DeclareUnicodeCharacter{00A0}{\nobreakspace}
+        \DeclareUnicodeCharacter{2203}{\ensuremath{\exists}}
+        \DeclareUnicodeCharacter{2200}{\ensuremath{\forall}}
+        \DeclareUnicodeCharacter{2286}{\ensuremath{\subseteq}}
+        \DeclareUnicodeCharacter{2713}{x}
+        \DeclareUnicodeCharacter{27FA}{\ensuremath{\Longleftrightarrow}}
+        \DeclareUnicodeCharacter{221A}{\ensuremath{\sqrt{}}}
+        \DeclareUnicodeCharacter{221B}{\ensuremath{\sqrt[3]{}}}
+        \DeclareUnicodeCharacter{2295}{\ensuremath{\oplus}}
+        \DeclareUnicodeCharacter{2297}{\ensuremath{\otimes}}
+        \begin{CJK}{UTF8}{gbsn}
+        \AtEndDocument{\end{CJK}}
+        ''',
+}