diff --git a/Makefile b/Makefile
index 3799cf6e..9f72f712 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ endif
 .PHONY: all cls doc clean FORCE_MAKE copy
 
 $(PACKAGE).pdf: cls FORCE_MAKE
-	$(LATEXMK) -xelatex $(PACKAGE).dtx
+	@$(LATEXMK) -xelatex $(PACKAGE).dtx
 
 $(CLSFILE): $(SOURCES)
 	yes y | xetex $(PACKAGE).ins
@@ -70,13 +70,19 @@ copy: cls
 
 # Generate scaffolds for overleaf
 overleaf: doc FORCE_MAKE
+	# if $version is not specified, alert the user.
+	@if [ -z "$$version" ]; then \
+		echo -e "\e[32mPlease specify the version of the template you want to generate.\e[0m"; \
+		echo -e "\e[32mFor example: make overleaf version=1.0.0\e[0m"; \
+		exit 1; \
+	fi
 	git clean -fdx ./templates/
 	rm -rf overleaf
 	make copy
 	mkdir overleaf
 	ls templates | \
 		xargs -I {} bash -c \
-		"cp -r ./templates/{} overleaf && cp $(PACKAGE).pdf ./overleaf/{} && zip -r ./overleaf/{}.zip ./overleaf/{}"
+		"cp -r ./templates/{} overleaf && cp $(PACKAGE).pdf ./overleaf/{} && zip -r ./overleaf/BIThesis-{}-v$(version).zip ./overleaf/{}"
 
 dev:
 	ls bithesis.dtx | entr -s 'yes y | make doc && make copy'
diff --git a/bithesis.dtx b/bithesis.dtx
index 7669b656..f34e8fa9 100644
--- a/bithesis.dtx
+++ b/bithesis.dtx
@@ -2229,7 +2229,7 @@
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
 % Hide color and border in hyperref.
-\RequirePackage[hidelinks]{hyperref}
+\RequirePackage[hidelinks,bookmarksnumbered]{hyperref}
 \RequirePackage{xcolor}
 \RequirePackage{caption}
 \RequirePackage{array}
@@ -3594,6 +3594,7 @@
         \chapter{\c_@@_label_abstract_tl}
       } {
         \chapter*{\c_@@_label_abstract_tl}
+        \currentpdfbookmark{\c_@@_label_abstract_tl}{ch:abstract}
       }
     }
     \vspace*{1mm}
@@ -3664,6 +3665,7 @@
         \chapter{\c_@@_label_abstract_en_tl}
       } {
         \chapter*{\c_@@_label_abstract_en_tl}
+        \currentpdfbookmark{\c_@@_label_abstract_en_tl}{ch:abstract:en}
       }
     }
   }
@@ -4034,7 +4036,7 @@
 % \end{environment}
 
 % \begin{environment}{symbols}
-% 生成主要术语对照包。
+% 生成主要术语对照表。
 %    \begin{macrocode}
 \NewDocumentEnvironment {symbols} {}
   {
@@ -4042,6 +4044,7 @@
       \chapter{\c_@@_label_symbols_tl}
     } {
       \chapter*{\c_@@_label_symbols_tl}
+      \currentpdfbookmark{\c_@@_label_symbols_tl}{ch:symbols}
     }
     \zihao{-4}
     \begin{itemize}[
diff --git a/templates/graduate-thesis/bithesis.cls b/templates/graduate-thesis/bithesis.cls
index 8943863b..4306607e 100644
--- a/templates/graduate-thesis/bithesis.cls
+++ b/templates/graduate-thesis/bithesis.cls
@@ -418,7 +418,7 @@
 \RequirePackage{multirow}
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
-\RequirePackage[hidelinks]{hyperref}
+\RequirePackage[hidelinks,bookmarksnumbered]{hyperref}
 \RequirePackage{xcolor}
 \RequirePackage{caption}
 \RequirePackage{array}
@@ -1480,6 +1480,7 @@
         \chapter{\c__bithesis_label_abstract_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_tl}{ch:abstract}
       }
     }
     \vspace*{1mm}
@@ -1544,6 +1545,7 @@
         \chapter{\c__bithesis_label_abstract_en_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_en_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_en_tl}{ch:abstract:en}
       }
     }
   }
@@ -1861,6 +1863,7 @@
       \chapter{\c__bithesis_label_symbols_tl}
     } {
       \chapter*{\c__bithesis_label_symbols_tl}
+      \currentpdfbookmark{\c__bithesis_label_symbols_tl}{ch:symbols}
     }
     \zihao{-4}
     \begin{itemize}[
diff --git a/templates/paper-translation/bithesis.cls b/templates/paper-translation/bithesis.cls
index 8943863b..4306607e 100644
--- a/templates/paper-translation/bithesis.cls
+++ b/templates/paper-translation/bithesis.cls
@@ -418,7 +418,7 @@
 \RequirePackage{multirow}
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
-\RequirePackage[hidelinks]{hyperref}
+\RequirePackage[hidelinks,bookmarksnumbered]{hyperref}
 \RequirePackage{xcolor}
 \RequirePackage{caption}
 \RequirePackage{array}
@@ -1480,6 +1480,7 @@
         \chapter{\c__bithesis_label_abstract_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_tl}{ch:abstract}
       }
     }
     \vspace*{1mm}
@@ -1544,6 +1545,7 @@
         \chapter{\c__bithesis_label_abstract_en_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_en_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_en_tl}{ch:abstract:en}
       }
     }
   }
@@ -1861,6 +1863,7 @@
       \chapter{\c__bithesis_label_symbols_tl}
     } {
       \chapter*{\c__bithesis_label_symbols_tl}
+      \currentpdfbookmark{\c__bithesis_label_symbols_tl}{ch:symbols}
     }
     \zihao{-4}
     \begin{itemize}[
diff --git a/templates/undergraduate-thesis-en/bithesis.cls b/templates/undergraduate-thesis-en/bithesis.cls
index 8943863b..4306607e 100644
--- a/templates/undergraduate-thesis-en/bithesis.cls
+++ b/templates/undergraduate-thesis-en/bithesis.cls
@@ -418,7 +418,7 @@
 \RequirePackage{multirow}
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
-\RequirePackage[hidelinks]{hyperref}
+\RequirePackage[hidelinks,bookmarksnumbered]{hyperref}
 \RequirePackage{xcolor}
 \RequirePackage{caption}
 \RequirePackage{array}
@@ -1480,6 +1480,7 @@
         \chapter{\c__bithesis_label_abstract_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_tl}{ch:abstract}
       }
     }
     \vspace*{1mm}
@@ -1544,6 +1545,7 @@
         \chapter{\c__bithesis_label_abstract_en_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_en_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_en_tl}{ch:abstract:en}
       }
     }
   }
@@ -1861,6 +1863,7 @@
       \chapter{\c__bithesis_label_symbols_tl}
     } {
       \chapter*{\c__bithesis_label_symbols_tl}
+      \currentpdfbookmark{\c__bithesis_label_symbols_tl}{ch:symbols}
     }
     \zihao{-4}
     \begin{itemize}[
diff --git a/templates/undergraduate-thesis/bithesis.cls b/templates/undergraduate-thesis/bithesis.cls
index 8943863b..4306607e 100644
--- a/templates/undergraduate-thesis/bithesis.cls
+++ b/templates/undergraduate-thesis/bithesis.cls
@@ -418,7 +418,7 @@
 \RequirePackage{multirow}
 \RequirePackage{tikz}
 \RequirePackage{etoolbox}
-\RequirePackage[hidelinks]{hyperref}
+\RequirePackage[hidelinks,bookmarksnumbered]{hyperref}
 \RequirePackage{xcolor}
 \RequirePackage{caption}
 \RequirePackage{array}
@@ -1480,6 +1480,7 @@
         \chapter{\c__bithesis_label_abstract_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_tl}{ch:abstract}
       }
     }
     \vspace*{1mm}
@@ -1544,6 +1545,7 @@
         \chapter{\c__bithesis_label_abstract_en_tl}
       } {
         \chapter*{\c__bithesis_label_abstract_en_tl}
+        \currentpdfbookmark{\c__bithesis_label_abstract_en_tl}{ch:abstract:en}
       }
     }
   }
@@ -1861,6 +1863,7 @@
       \chapter{\c__bithesis_label_symbols_tl}
     } {
       \chapter*{\c__bithesis_label_symbols_tl}
+      \currentpdfbookmark{\c__bithesis_label_symbols_tl}{ch:symbols}
     }
     \zihao{-4}
     \begin{itemize}[