diff --git a/elegantpaper-cn.tex b/elegantpaper-cn.tex
index df983c9..8c77615 100644
--- a/elegantpaper-cn.tex
+++ b/elegantpaper-cn.tex
@@ -13,6 +13,7 @@
 % 本文档命令
 \usepackage{array}
 \newcommand{\ccr}[1]{\makecell{{\color{#1}\rule{1cm}{1cm}}}}
+\addbibresource[location=local]{reference.bib} % 参考文献，不要删除
 
 \begin{document}
 
diff --git a/elegantpaper-en.tex b/elegantpaper-en.tex
index 73499dc..91c4cf7 100644
--- a/elegantpaper-en.tex
+++ b/elegantpaper-en.tex
@@ -13,6 +13,7 @@
 \usepackage{array}
 \newcommand{\ccr}[1]{\makecell{{\color{#1}\rule{1cm}{1cm}}}}
 
+\addbibresource[location=local]{reference.bib} % reference file
 \begin{document}
 
 \maketitle
diff --git a/elegantpaper.cls b/elegantpaper.cls
index 828171b..b813c1e 100644
--- a/elegantpaper.cls
+++ b/elegantpaper.cls
@@ -365,7 +365,7 @@
 	backgroundcolor=\color{lightgrey}
 }
 
-\addbibresource[location=local]{reference.bib}
+
 
 % restore the tt default family to lmodern tt family
 \renewcommand\ttdefault{lmtt}