diff --git a/source/njuthesis.dtx b/source/njuthesis.dtx
index 68e820dacbd950213ec004ea33709f6c381cd8bd..1249a25ab3fe1c7d8cb1f11a7597b27cafbf44ec 100644
--- a/source/njuthesis.dtx
+++ b/source/njuthesis.dtx
@@ -113,11 +113,12 @@ through XeTeX.
 %<*driver>
 \ProvidesFile{njuthesis.dtx}
 \documentclass{ctxdoc}
-\usepackage{listings,tabularray,njuvisual}
+\usepackage{listings,njuvisual,tabularray}
 \usepackage[firstpage=true]{background}
 \backgroundsetup{contents={\njuemblem[white!85!gray]{22cm}{!}},scale=1,angle=0,hshift=-4cm}
 \newcommand*\scite[1]{\textsuperscript{\cite{#1}}}
 \setlist[1]{labelindent=0.5em}
+\hypersetup{pdftitle={The njuthesis class 鈥� LaTeX thesis template for Nanjing University}}
 \UseTblrLibrary{booktabs,siunitx,diagbox}
 \DefTblrTemplate{caption-tag}{default}{琛╘hspace{0.25em}\thetable}
 \SetTblrStyle{caption-tag}{font=\bfseries}
@@ -133,6 +134,7 @@ through XeTeX.
     xleftmargin     = 2 em,
     xrightmargin    = 3 em,
     escapeinside    = {(*}{*)},
+    breaklines      = true,
     basicstyle      = \small\ttfamily,
     keywordstyle    = \bfseries\color{njuviolet},
     commentstyle    = \itshape\color{white!50!gray},
@@ -1184,10 +1186,10 @@ through XeTeX.
 % \subsection{瑙嗚璇嗗埆绯荤粺}
 %
 % 瑙嗚璇嗗埆绯荤粺 \pkg{njuvisual} 鐜板凡琚垎绂讳负鐙珛瀹忓寘锛屽熀鏈娇鐢ㄦ柟娉曚妇渚嬪涓嬶細
-% \begin{latexexample}[moretexcs={\njuemblem}]
-%   \njuemblem{!}{3cm}                           % 榛樿鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶ф牎寰�
-%   \njuname{4cm}{!}                             % 榛樿鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶т腑鏂囨牎鍚�
-%   \njuname*{4cm}{!}                            % 榛樿鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶ц嫳鏂囨牎鍚�
+% \begin{latexexample}[moretexcs={\njuemblem,\njuname}]
+%   \njuemblem{!}{3cm}                           % 鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶ф牎寰�
+%   \njuname{4cm}{!}                             % 鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶т腑鏂囨牎鍚�
+%   \njuname*{4cm}{!}                            % 鐢熸垚鎸囧畾澶у皬鐨勭传鑹插崡澶ц嫳鏂囨牎鍚�
 %   \njuemblem[black]{!}{3cm}                    % 榛戣壊鐨勫崡澶ф牎寰�
 %   \njuemblem[department=dii]{!}{4cm}           % 绱壊鍖¢櫌寰芥爣
 %   \njuemblem[department=cs,color=blue]{!}{3cm} % 绾摑鑹茶绉戝窘鏍�
@@ -2505,415 +2507,40 @@ through XeTeX.
   }
 %    \end{macrocode}
 %
-% 鍒ゆ柇瀛︿綅杩涜鍛戒护瀹氫箟
+% 浣跨敤 \pkg{xtemplate} 閲嶆瀯灏侀潰妯℃澘
 %    \begin{macrocode}
-\int_compare:nTF { \g_@@_info_degree_int == 1 } 
-  {
-    % 鏈
-    \tl_const:Nn \c_@@_name_title_tl { 棰榎hfill 鐩� }
-    
-    \tl_const:Nn \c_@@_cover_uline_len_a_tl { 250pt }
-    \tl_const:Nn \c_@@_cover_uline_len_b_tl { 90pt }
-    \tl_const:Nn \c_@@_cover_uline_font_tl { \songti }
-    \tl_const:Nn \c_@@_cover_uline_style_tl { \bf }
-    \tl_const:Nn \c_@@_cover_uline_bskip_tl {}
-
-    \tl_const:Nn \c_@@_cover_box_len_tl { 4.2em }
-
-    % 鏈寮哄埗涓嶆墦鍗板浗瀹跺浘涔﹂灏侀潰
-    \bool_set_false:N \g_@@_nlcover_bool
-  } 
-  { 
-    % 鏈浠ュ閮芥槸鐮旂┒鐢� 
-    \tl_const:Nn \c_@@_name_title_tl { 璁篭hfill 鏂嘰hfill 棰榎hfill 鐩� }
-
-    \tl_const:Nn \c_@@_cover_uline_len_a_tl { 250pt }
-    \tl_const:Nn \c_@@_cover_uline_len_b_tl { 14em }
-    \tl_const:Nn \c_@@_cover_uline_font_tl { \kaishu }
-    \tl_const:Nn \c_@@_cover_uline_style_tl {}
-    \tl_const:Nn \c_@@_cover_uline_bskip_tl { \hspace{1em} }
-
-    \tl_const:Nn \c_@@_cover_box_len_tl { 6em }
-  }
-%    \end{macrocode}
-% \begin{macro}{\@@_spread_box:nn}
-% 鏉ヨ嚜\cls{fduthesis}锛氬垎鏁e榻愮殑姘村钩鐩掑瓙銆�
-% \begin{arguments}
-%   \item   瀹藉害
-%   \item   鍐呭
-% \end{arguments}
-% 鍒╃敤 \cs{tl_map_inline:nn} 鍦ㄥ瓧绗﹂棿鎻掑叆 \tn{hfil}锛涚揣闅忓叾鍚庣殑 \tn{unskip}
-% 灏嗕細鍘绘帀鏈€鍚庝竴涓� \tn{hfil}銆傝 \url{https://tex.stackexchange.com/q/169689}銆�
-% |#2| 闇€瑕佸畬鍏ㄥ睍寮€浠ラ伩鍏� underfull 璀﹀憡銆�
-%    \begin{macrocode}
-\cs_generate_variant:Nn \tl_map_inline:nn       { xn }
-\cs_new_protected:Npn \@@_spread_box:nn #1#2
-  {
-    \mode_leave_vertical:
-    \hbox_to_wd:nn {#1}
-      { \tl_map_inline:xn {#2} { ##1 \hfil } \unskip }
-  }
-%    \end{macrocode}
-% \end{macro}
+% 澹版槑灏侀潰瀵硅薄銆�
+% \DeclareObjectType {鉄╫bject type鉄﹠ {鉄╪o. of args鉄﹠
+\DeclareObjectType { nju / cover } { \c_zero_int }
 %
-% \begin{macro}{\@@_cover_uline_a:n}
-% 鍦ㄥ皝闈㈢粯鍒朵笅鍒掔嚎
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_cover_uline_a:n #1
+% 澹版槑灏侀潰妯℃澘銆�
+% \DeclareTemplateInterface {鉄╫bject type鉄﹠ {鉄╰emplate鉄﹠ {鉄╪o. of args鉄﹠ {鉄╧ey list鉄﹠
+\DeclareTemplateInterface { nju / cover } { undergraduate } { \c_zero_int }
   {
-    \uline{\makebox[\c_@@_cover_uline_len_a_tl]
-      {\rm\c_@@_cover_uline_font_tl #1 }}
+    format      : tokenlist
   }
-\cs_new_protected:Npn \@@_cover_uline_b:n #1
+\tl_new:N \l_@@_ug_format_tl
+% \DeclareTemplateCode {鉄╫bject type鉄﹠ {鉄╰emplate鉄﹠ {鉄╪o. of args鉄﹠ {鉄╧ey bindings鉄﹠ {鉄╟ode鉄﹠
+\DeclareTemplateCode { nju / cover } { undergraduate } { \c_zero_int } 
   {
-    \uline{\makebox[\c_@@_cover_uline_len_b_tl]
-      {\rm\c_@@_cover_uline_font_tl #1 }}
+    format      = \l_@@_ug_format_tl
   }
-\cs_new_protected:Npn \@@_cover_uline_nl:nn #1 #2
   {
-    \uline{\makebox[#1]
-      {\rm\c_@@_cover_uline_font_tl #2 }}
+    \AssignTemplateKeys
+    \chapter*{TITLE PAGE}
+    \tl_use:c {\l_@@_ug_format_tl }
+    { Random words}
   }
-%    \end{macrocode}
-% \end{macro}
-%
-% 
-% \begin{macro}{\@@_cover_box:n}
-% 灏侀潰琛ㄦ牸杈规
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_cover_box:n #1 
-  {
-    \makebox[\c_@@_cover_box_len_tl][s]{
-      #1\c_@@_cover_uline_bskip_tl}
-  }
-%    \end{macrocode}
-% \end{macro}
 %
-% \begin{macro}{\@@_cover_degree:}
-% 瀛︿綅绫诲瀷銆�
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_cover_degree:
+% \DeclareInstance {鉄╫bject type 鉄﹠ {鉄╥nstance 鉄﹠ {鉄╰emplate 鉄﹠ {鉄╬arameters 鉄﹠
+\DeclareInstance { nju / cover } { cover-ug } { undergraduate } 
   {
-    { 锛堢敵璇� }
-    \clist_item:Nn \c_@@_name_degree_clist { \g_@@_info_degree_int }
-    { 瀛︿綅锛� }
+    format      = centering
   }
-%    \end{macrocode}
-% \end{macro}
-%
-% \subsubsection{灏侀潰缁勪欢}
 %
-% \begin{macro}{\@@_cover_title_breakline:}
-% 瀵规爣棰樿繘琛岃嚜鍔ㄥ垽鏂紝濡傛灉鏌愯鏍囬绌哄垯涓嶈緭鍑烘帴涓嬫潵鐨勮嫢骞茶锛屽緱鍒板琛屾爣棰樸€�
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_cover_title_breakline:
-  {
-    \@@_cover_box:n {\c_@@_name_title_tl}
-    & \@@_cover_uline_a:n 
-    { \c_@@_cover_uline_style_tl \l_@@_info_title_a_tl } \\
-    \tl_if_empty:NF \l_@@_info_title_b_tl
-    {
-      \tl_if_empty:NTF \l_@@_info_title_c_tl
-        { 
-          & \@@_cover_uline_a:n  
-          {\c_@@_cover_uline_style_tl \l_@@_info_title_b_tl } \\ 
-        }
-        {
-          & \@@_cover_uline_a:n  
-          { \c_@@_cover_uline_style_tl \l_@@_info_title_b_tl } \\
-          & \@@_cover_uline_a:n  
-          { \c_@@_cover_uline_style_tl \l_@@_info_title_c_tl } \\
-        }
-    }
-  }
-%    \end{macrocode}
-% \end{macro}
+% \UseInstance {鉄╫bject type 鉄﹠ {鉄╥nstance 鉄﹠ 鉄╝rguments 鉄�
+% \UseTemplate {鉄╫bject type 鉄﹠ {鉄╰emplate 鉄﹠ {鉄╯ettings 鉄﹠ 鉄╝rguments 鉄�
 %
-% \begin{macro}{\@@_print_covertab:}
-% 灏侀潰淇℃伅鏍�
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_print_covertab:
-{%
-\int_compare:nTF { \g_@@_info_degree_int == 1 } 
-  {
-    \begin{tabular}{p{4.2em}c}
-      \@@_cover_box:n {闄hfill 绯粆
-      & \@@_cover_uline_a:n  {\l_@@_info_dept_tl} \\
-      \@@_cover_box:n {涓揬hfill 涓殅
-      & \@@_cover_uline_a:n  {\l_@@_major_tl} \\
-      \@@_cover_title_breakline:
-    \end{tabular}\\
-  
-    \begin{tabular}{p{4.2em}cp{4.2em}c}
-      \@@_cover_box:n {骞碶hfill 绾
-      & \@@_cover_uline_b:n {\l_@@_info_grade_tl}
-      & \@@_cover_box:n {瀛hfill 鍙穧
-      & \@@_cover_uline_b:n {\l_@@_info_id_tl}\\
-    \end{tabular}\\
-    
-    \begin{tabular}{p{4.2em}c}
-      \@@_cover_box:n {瀛hfill 鐢焅hfill 濮揬hfill 鍚峿
-      & \@@_cover_uline_a:n  {\l_@@_info_author_tl}
-    \end{tabular}\\
-    \begin{tabular}{p{4.2em}cp{4.2em}c}
-      \@@_cover_box:n {瀵糪hfill 甯坿
-      & \@@_cover_uline_b:n {\l_@@_info_supv_a_tl}
-      & \@@_cover_box:n {鑱孿hfill 绉皚
-      & \@@_cover_uline_b:n {\l_@@_info_supv_a_title_tl}\\
-  
-      % 绗簩瀵煎笀
-      \tl_if_empty:NF \l_@@_info_supv_b_tl
-      {
-        \@@_cover_box:n {绗琝hfill 浜孿hfill 瀵糪hfill 甯坿
-        & \@@_cover_uline_b:n {\l_@@_info_supv_b_tl}
-        & \@@_cover_box:n {鑱孿hfill 绉皚
-        & \@@_cover_uline_b:n {\l_@@_info_supv_b_title_tl}\\
-      }
-    \end{tabular}\\
-  
-    \begin{tabular}{p{4.2em}c}
-      \@@_cover_box:n {鎻怽hfill 浜hfill 鏃hfill 鏈焳
-      & \@@_cover_uline_a:n  {\l_@@_submit_date_tl}\\
-    \end{tabular}  
-  } 
-  { 
-    \begin{tabular}{p{6em}c}    
-      \@@_cover_title_breakline:
-      \@@_cover_box:n {浣淺hfill 鑰匼hfill 濮揬hfill 鍚峿
-      & \@@_cover_uline_a:n  {\@@_spread_box:nn {4em}{\l_@@_info_author_tl}}\\
-      \@@_cover_box:n {涓揬hfill 涓歕hfill 鍚峔hfill 绉皚
-      & \@@_cover_uline_a:n  {\l_@@_major_tl}\\
-      \@@_cover_box:n {鐮擻hfill 绌禱hfill 鏂筡hfill 鍚憓
-      & \@@_cover_uline_a:n  {\l_@@_field_tl}\\
-      \@@_cover_box:n {鎸嘰hfill 瀵糪hfill 鏁橽hfill 甯坿
-      & \@@_cover_uline_a:n  {\l_@@_info_supv_full_tl}\\
-    \end{tabular}
-  } 
-}
-%    \end{macrocode}
-% \end{macro}
-%
-% 
-% \subsubsection{缁樺埗灏侀潰}
-% 
-% \begin{macro}{\@@_print_cover_nl:}
-% \changes{v0.12}{2021/12/02}{閫夋嫨|nlcover|鏃朵笉鐢熸垚鏅€氬皝闈€€倉
-% 鎸夐渶缁樺埗鍥藉鍥句功棣嗗皝闈紝淇敼鑷儭娴锋槦妯℃澘
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_print_cover_nl:
-{
-  \pdfbookmark[0]{鍥藉鍥句功棣嗗皝闈{nl}
-  {
-    % 椤剁
-    \noindent\null\vskip -20mm \hskip -15mm
-    \songti\zihao{-4}
-    \makebox[40pt][l]{鍒嗙被鍙穧
-    \@@_cover_uline_b:n {\l_@@_info_clc_tl}
-    \hfill
-    \makebox[40pt][l]{瀵嗙骇}
-    \@@_cover_uline_b:n {\l_@@_info_seclv_tl}
-    \vskip 10pt \hskip -15mm
-    \makebox[40pt][l]{udc}
-    \@@_cover_uline_b:n {\l_@@_info_udc_tl}
-  }
-
-  % 涓儴
-  \vskip\stretch{2}
-  \begin{center}
-    \def\ULthickness{1pt}
-    {\kaishu\zihao{-0} 瀛hspace{0.5em}浣峔hspace{0.5em}璁篭hspace{0.5em}鏂噠
-    {
-      \kaishu\zihao{1}
-      \vskip \stretch{1}
-      \@@_cover_uline_b:n {\l_@@_info_title_a_tl}\\
-      \@@_cover_uline_b:n {\l_@@_info_title_b_tl}\\
-      \@@_cover_uline_b:n {\l_@@_info_title_c_tl}\\
-    }
-    \vskip \stretch{1}
-    {\kaishu\zihao{4}锛堥鍚嶅拰鍓鍚嶏級}
-    \vskip \stretch{1} \vskip 5mm
-    {\kaishu\zihao{1}\uline{\makebox{\l_@@_info_author_tl}}}
-    \vskip \stretch{1}
-    {\kaishu\zihao{4}锛堜綔鑰呭鍚嶏級}
-  \end{center}
-
-  % 搴曢儴
-  \vskip\stretch{1}\kaishu\zihao{4}
-  \noindent 鎸囧鏁欏笀濮撳悕銆佽亴鍔°€佽亴绉般€佸浣嶃€佸崟浣嶅悕绉板強鍦板潃%
-  \@@_cover_uline_nl:nn {94pt}{\l_@@_info_supv_a_tl}\par
-  \noindent \@@_cover_uline_nl:nn {\textwidth}{%
-  \l_@@_info_supv_cont_tl}\par
-  \noindent 鐢宠瀛︿綅绾у埆%
-  \@@_cover_uline_nl:nn {9em}{\clist_item:Nn \c_@@_name_degree_clist { \g_@@_info_degree_int }}%
-  \noindent 涓撲笟鍚嶇О%
-  \uline{\hfill\l_@@_major_tl\hfill}\par
-  \noindent 璁烘枃鎻愪氦鏃ユ湡%
-  \@@_cover_uline_nl:nn {9em}{\l_@@_submit_date_tl}%
-  \noindent 璁烘枃绛旇京鏃ユ湡%
-  \uline{\hfill\l_@@_defend_date_tl\hfill}\par
-  \noindent 瀛︿綅鎺堜簣鍗曚綅鍜屾棩鏈焅uline{\hfill}\par
-  \begin{flushright}
-    绛旇京濮斿憳浼氫富甯細
-    \@@_cover_uline_nl:nn {9em}{ \l_@@_info_chairman_tl }\par
-    璇勯槄浜猴細
-    \@@_cover_uline_nl:nn {9em}
-      { \clist_item:Nn \l_@@_info_reviewer_clist {1} }\par
-    \@@_cover_uline_nl:nn {9em}
-      { \clist_item:Nn \l_@@_info_reviewer_clist {2} }\par
-    \@@_cover_uline_nl:nn {9em}
-      { \clist_item:Nn \l_@@_info_reviewer_clist {3} }\par
-    \@@_cover_uline_nl:nn {9em}
-      { \clist_item:Nn \l_@@_info_reviewer_clist {4} }\par
-  \end{flushright}
-  \begin{center}
-    \kaishu\zihao{3}\hspace{2em} 骞碶hspace{1em} 鏈圽hspace{1em} 鏃�
-  \end{center}
-  \vskip -10mm
-}
-%    \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_print_declaration:}
-% \changes{v0.12}{2021/12/02}{娣诲姞鍘熷垱鎬у0鏄庨〉闈€€倉
-% 鍘熷垱鎬у0鏄庛€�
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_print_declaration:
-  {
-    \normalfont\normalsize
-    \chapter*{鍗椾含澶у瀛︿綅璁烘枃鍘熷垱鎬у0鏄巬
-    \thispagestyle{empty}
-    \c_@@_orig_decl_text_tl
-    \vfil
-    \begin{flushright}
-      {鐮旂┒鐢熺鍚嶏細} \uline{\makebox[5em]{}}
-      {鏃ユ湡锛殅 \uline{\makebox[5em]{}}
-    \end{flushright}
-    \vfil
-  }
-%    \end{macrocode}
-% \end{macro}
-%
-% \begin{macro}{\@@_print_cover_ug:}
-% 鏈灏侀潰
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_print_cover_ug:
-  {
-    \pdfbookmark{灏侀潰}{cover} % 灏嗗皝闈㈡彃鍏df涔︾
-    \begin{spacing}{1.25}
-    \noindent\null\hspace{-10mm}
-    \njuemblem[black]{!}{3cm}\smallskip 
-    \begin{center}
-      \njuname[black]{!}{3.35cm}
-      \vskip 10mm 
-      {\zihao{1}\bf\songti\@@_spread_box:nn {9em}{鏈姣曚笟璁烘枃}}
-      \vfill
-      \vskip\stretch{0}
-      {\bgroup
-      \kaishu\zihao{3}
-      \def\tabcolsep{1pt}
-      \def\arraystretch{1.5}
-      % 缁樺埗淇℃伅妗�
-      \@@_print_covertab: 
-      \egroup}
-      \vfill
-    \end{center}
-    \end{spacing}
-  }
-%    \end{macrocode}
-% \end{macro}
-%
-% 
-% \begin{macro}{\@@_print_cover_g:}
-% 鐮旂┒鐢熷皝闈�
-%    \begin{macrocode}
-\cs_new_protected:Npn \@@_print_cover_g:
-{
-  \pdfbookmark{灏侀潰}{cover} % 灏嗗皝闈㈡彃鍏df涔︾
-  \begin{spacing}{1.25}
-  \begin{center}
-    \noindent\null\vskip 5mm
-    \njuemblem[black]{!}{1.9cm}
-    \vskip 10mm 
-    \njuname[black]{4.4cm}{!}
-    \par\vskip -2mm 
-    \njuname*[black]{4.4cm}{!}
-    \vskip 15mm 
-    \bgroup
-      \zihao{1}\bf\kaishu
-      \@@_spread_box:nn {10em}{鐮旂┒鐢熸瘯涓氳鏂噠
-      \vskip 5mm
-      \@@_cover_degree:
-    \egroup
-    \par\vfill\vskip\stretch{0}
-    \bgroup
-      \bf\kaishu\zihao{3}
-      \def\tabcolsep{1pt}
-      \def\arraystretch{1.5}
-      \vskip 10mm
-      \@@_print_covertab:
-    \egroup
-    \vfill
-    \vskip 10mm
-    \bgroup
-      \bf\kaishu\zihao{4}\l_@@_submit_date_tl
-    \egroup
-    \vskip 15mm
-  \end{center}
-  \end{spacing}
-
-  \newpage % 灏侀潰鑳岄潰
-  \begin{spacing}{1.625}
-    \null\vfill
-    {\bgroup
-    \kaishu\zihao{3}
-    \makebox[6em][s]{\bf\kaishu 瀛hfill 鍙穧锛歕MakeUppercase{\l_@@_info_id_tl}
-    \par
-    \makebox[6em][s]{\bf\kaishu 璁烘枃绛旇京鏃ユ湡}锛歕l_@@_defend_date_tl
-    \par
-    \makebox[6em][s]{\bf\kaishu 鎸嘰hfill 瀵糪hfill 鏁橽hfill 甯坿锛歕hspace{50mm}锛堢瀛楋級
-    \par
-    \egroup}
-    \vskip 15mm
-  \end{spacing}
-  
-% 鐮旂┒鐢熻嫳鏂囧皝闈�
-  \newpage
-  \pdfbookmark{鑻辨枃灏侀潰}{cover-en} % 灏嗗皝闈㈡彃鍏df涔︾
-  \begin{center}
-    \noindent\vspace*{20pt}
-    \bf\sffamily\zihao{2}\l_@@_info_title_en_tl
-    \vskip \stretch{1}
-    \normalfont\rmfamily\zihao{4}{by}
-    \vskip 3pt
-    \bf\sffamily\zihao{4}\l_@@_info_author_en_tl
-    \vskip\stretch{1}
-    \normalfont\rmfamily\zihao{4}{Supervised~by}
-    \vskip 3pt
-    \normalfont\sffamily\zihao{4}
-    \l_@@_info_supv_a_title_en_tl
-    \hspace{.5em}\l_@@_info_supv_a_en_tl\\
-    \l_@@_info_supv_b_title_en_tl
-    \hspace{.5em}\l_@@_info_supv_b_en_tl
-    \vskip\stretch{1}
-    \normalsize\rmfamily{
-      A~dissertation~submitted~to\\
-      the~graduate~school~of~Nanjing~University\\
-      in~partial~fulfilment~of~the~requirements~for~the~degree~of\\
-      \textsc{
-        \clist_item:Nn \c_@@_name_degree_en_clist { \g_@@_info_degree_int }
-        }\\
-      in\\
-      {\l_@@_major_en_tl}
-    }
-    \vskip\stretch{2}
-    \njuemblem[black]{2.5cm}{!}\par
-    \vskip 3mm
-    \normalfont\l_@@_info_dept_en_tl\\
-    {Nanjing~University}
-    \vskip 30pt
-    \normalfont\normalsize\l_@@_submit_date_en_tl
-  \end{center}
-}
 %    \end{macrocode}
 % \end{macro}
 %
@@ -2926,9 +2553,10 @@ through XeTeX.
 \RenewDocumentCommand \maketitle { }
   {
     \pagestyle{empty}
-    \bool_if:NTF \g_@@_nlcover_bool 
-      { \@@_print_cover_nl: \@@_print_declaration: }
-      { \use:c { @@_print_cover_ \g_@@_info_diploma_tl : } }
+    \UseInstance { nju / cover } { cover-ug }
+    % \bool_if:NTF \g_@@_nlcover_bool 
+    %   { \@@_print_cover_nl: \@@_print_declaration: }
+    %   { \use:c { @@_print_cover_ \g_@@_info_diploma_tl : } }
 %    \end{macrocode}
 % 鍦ㄦ爣棰橀〉鍚庝娇鐢ㄥぇ鍐欑綏椹瓧姣嶉〉鐮併€�
 %    \begin{macrocode}