diff --git a/config/font/simfang.ttf b/config/font/simfang.ttf
new file mode 100644
index 0000000..2b59eae
Binary files /dev/null and b/config/font/simfang.ttf differ
diff --git a/config/font/simhei.ttf b/config/font/simhei.ttf
new file mode 100644
index 0000000..d52d718
Binary files /dev/null and b/config/font/simhei.ttf differ
diff --git a/config/font/simkai.ttf b/config/font/simkai.ttf
new file mode 100644
index 0000000..1aa018b
Binary files /dev/null and b/config/font/simkai.ttf differ
diff --git a/config/font/simsun.ttf b/config/font/simsun.ttf
new file mode 100644
index 0000000..97a3e47
Binary files /dev/null and b/config/font/simsun.ttf differ
diff --git a/config/font/times.ttf b/config/font/times.ttf
new file mode 100644
index 0000000..a998fee
Binary files /dev/null and b/config/font/times.ttf differ
diff --git a/config/font/timesbd.ttf b/config/font/timesbd.ttf
new file mode 100644
index 0000000..bade374
Binary files /dev/null and b/config/font/timesbd.ttf differ
diff --git a/config/font/timesbi.ttf b/config/font/timesbi.ttf
new file mode 100644
index 0000000..ba7ba5f
Binary files /dev/null and b/config/font/timesbi.ttf differ
diff --git a/config/font/timesi.ttf b/config/font/timesi.ttf
new file mode 100644
index 0000000..28798d3
Binary files /dev/null and b/config/font/timesi.ttf differ
diff --git a/config/seuthesiY.cls b/config/seuthesiY.cls
index 6b9ddb3..6cc684b 100644
--- a/config/seuthesiY.cls
+++ b/config/seuthesiY.cls
@@ -20,7 +20,7 @@
 
 \NeedsTeXFormat{LaTeX2e}[1999/12/01]
 \ProvidesClass{seuthesiY}[2019/06/28 2.0.0 The LaTeX template for academic  degree thesis of Southeast University]
-\typeout{Document Class `seuthesiY' 2.0.0 by Deans Yu (2019/06/28). Document Class `seuthesiY' 1.0.2 by Deans Yu (2019/06/23). Document Class `seuthesix' 1.0.1 by James Fan (2016/03/20)}
+\typeout{Document Class `seuthesiY' 3.0.0 by Deans Yu (2019/10/06). Document Class `seuthesiY' 2.0.0 by Deans Yu (2019/06/28). Document Class `seuthesix' 1.0.1 by James Fan (2016/03/20)}
 
 \newif\ifnocolorlinks\nocolorlinksfalse
 \newif\ifcoadvisor\coadvisorfalse
@@ -31,7 +31,7 @@
 \newif\iffigurelist\figurelistfalse
 \newif\iftablelist\tablelistfalse
 \newif\ifnomlist\nomlistfalse
-\InputIfFileExists{seuthesix.cfg}
+\InputIfFileExists{config/seuthesix.cfg}
 {\typeout{[seuthesix]: Load seuthesix.cfg successfully!}}%
     {\typeout{[seuthesix]: Load seuthesix.cfg failed!}}%
 \DeclareOption{nocolorlinks}{\nocolorlinkstrue}
@@ -48,6 +48,38 @@
 \LoadClass[twoside,a4paper,zihao=-4,UTF8,openright]{ctexbook}
 \RequirePackage[titles]{tocloft}
 \renewcommand{\cftchapleader}{\bfseries\cftdotfill{\cftdotsep}}
+
+
+
+%===============================================================================
+%================================= 中英文字体===================================
+% 修改中文字体族，增加黑体
+\setCJKmainfont[
+Path = ./config/font/,
+BoldFont=simhei.ttf,
+ItalicFont=simkai.ttf,
+BoldItalicFont=simfang.ttf
+]{simsun.ttf}
+\setCJKfamilyfont{zhsong}[Path = ./config/font/]{simsun.ttf}
+\renewcommand{\songti}{\CJKfamily{zhsong}}
+\setCJKfamilyfont{zhhei}[Path = ./config/font/]{simhei.ttf}
+\renewcommand{\heiti}{\CJKfamily{zhhei}}
+\setCJKfamilyfont{zhkai}[Path = ./config/font/]{simkai.ttf}
+\newcommand{\kaiti}{\CJKfamily{zhkai}}
+\setCJKfamilyfont{zhfs}[Path = ./config/font/]{simfang.ttf}
+\newcommand{\fs}{\CJKfamily{zhfs}}
+
+% my change, 英文字体使用 Times New Roman
+\setmainfont[
+Path = ./config/font/,
+BoldFont=timesbd.ttf,
+ItalicFont=timesi.ttf,
+BoldItalicFont=timesbi.ttf
+]{times.ttf}
+
+% \setCJKmainfont{SimSun}[ItalicFont = KaiTi, AutoFakeBold = true]
+% \setmainfont[Mapping=tex-text]{Times New Roman}
+
 \newcommand{\chuhao}{\fontsize{42bp}{46bp}\selectfont}
 \newcommand{\xiaochuhao}{\fontsize{36bp}{40bp}\selectfont}
 \newcommand{\yichu}{\fontsize{32bp}{36bp}\selectfont}
@@ -62,7 +94,9 @@
 \newcommand{\liuhao}{\fontsize{7.5bp}{9bp}\selectfont}
 \newcommand{\xiaoliuhao}{\fontsize{6.5bp}{7.5bp}\selectfont}
 \newcommand{\qihao}{\fontsize{5.5bp}{6.5bp}\selectfont}
-\setCJKmainfont{SimSun}
+%===============================================================================
+
+
 \ctexset{%
     chapter/format=\centering,
     chapter/nameformat=\large\heiti,
@@ -80,7 +114,6 @@
 }
 \RequirePackage[font=small]{caption}
 %\RequirePackage{mathptmx}
-\setmainfont[Mapping=tex-text]{Times New Roman}
 \RequirePackage{amsmath}
 \RequirePackage{amssymb}
 \RequirePackage{amsthm}
@@ -109,10 +142,10 @@
 \renewcommand{\listalgorithmname}{算法目录}
 % \RequirePackage[super,square]{natbib}
 %================================================
-\RequirePackage[backend=biber,bibstyle=config/gb7714-2015,citestyle=config/gb7714-2015,gbfieldtype=true,url=false,gbpunctin=false,
+\RequirePackage[backend=biber,bibstyle=config/gb7714-2015,citestyle=config/gb7714-2015,gbfieldtype=true,url=false,doi=false,gbpunctin=false,
 gbpub=false,gbnamefmt=lowercase,gbbiblabel=dot,]{biblatex}
 %================================================
-\newcommand\citen[1]{[\!\!\citenum{#1}]}
+% \newcommand\citen[1]{[\!\!\citenum{#1}]}
 \RequirePackage{hyperref}
 \ifnocolorlinks
     \hypersetup{colorlinks=false}
diff --git a/config/seuthesix.cfg b/config/seuthesix.cfg
index a7524f5..4b383db 100644
--- a/config/seuthesix.cfg
+++ b/config/seuthesix.cfg
@@ -45,39 +45,47 @@
 \newcommand{\@thesistype}{\@degreelevel{}学位论文}
 \newcommand{\signline}{\underline{\makebox[2.5cm][s]{}}}
 \newcommand{\seudeclare}{
-\clearpage\thispagestyle{empty}\cleardoublepage\thispagestyle{empty}
-{\xiaosihao
-\begin{center}
-{\heiti\sanhao 东南大学学位论文独创性声明}
-\end{center}
-\vspace{0.5in}
-{ \linespread{1.5}
-本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的
-研究成果。尽我所知，除了文中特别加以标注和致谢的地方外，论文中不包
-含其他人已经发表或撰写过的研究成果，也不包含为获得东南大学或其它教
-育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的
-任何贡献均已在论文中作了明确的说明并表示了谢意。\par}
-\vspace{0.3in}
-\begin{flushright}
-研究生签名：\signline 日~期：\signline
-\end{flushright}
-\vspace{1.5in}
-\begin{center}
-{\heiti\sanhao 东南大学学位论文使用授权声明}
-\end{center}
-\vspace{0.5in}
-{ \linespread{1.5}
-东南大学、中国科学技术信息研究所、国家图书馆有权保留本人所送交学位
-论文的复印件和电子文档，可以采用影印、缩印或其他复制手段保存论文。
-本人电子文档的内容和纸质论文的内容相一致。除在保密期内的保密论文
-外，允许论文被查阅和借阅，可以公布（包括刊登）论文的全部或部分内容。
-论文的公布（包括刊登）授权东南大学研究生院办理。\par}
-\vspace{0.3in}
-\begin{flushright}
-研究生签名：\signline 导师签名：\signline 日~期：\signline
-\end{flushright}
-\par
-}
+    \clearpage\thispagestyle{empty}\cleardoublepage\thispagestyle{empty}
+    {
+        \begin{center}
+            {\heiti\sanhao 东南大学学位论文独创性声明}
+        \end{center}
+        \vspace{0.5in}
+
+
+        {\linespread{1.5}
+            本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的
+            研究成果。尽我所知，除了文中特别加以标注和致谢的地方外，论文中不包
+            含其他人已经发表或撰写过的研究成果，也不包含为获得东南大学或其它教
+            育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的
+            任何贡献均已在论文中作了明确的说明并表示了谢意。\par
+        }
+        \vspace{0.3in}
+        \begin{flushright}
+            研究生签名：\signline 日~期：\signline
+        \end{flushright}
+
+
+        \vspace{1.5in}
+        \begin{center}
+            {\heiti\sanhao 东南大学学位论文使用授权声明}
+        \end{center}
+        \vspace{0.5in}
+
+
+        { \linespread{1.5}
+            东南大学、中国科学技术信息研究所、国家图书馆有权保留本人所送交学位
+            论文的复印件和电子文档，可以采用影印、缩印或其他复制手段保存论文。
+            本人电子文档的内容和纸质论文的内容相一致。除在保密期内的保密论文
+            外，允许论文被查阅和借阅，可以公布（包括刊登）论文的全部或部分内容。
+            论文的公布（包括刊登）授权东南大学研究生院办理。\par
+        }
+        \vspace{0.3in}
+        \begin{flushright}
+            研究生签名：\signline 导师签名：\signline 日~期：\signline
+        \end{flushright}
+        \par
+    }
 }
 \endinput
 %%