Replace CJKfntef's \CJKunderline' with ulem's \uline'.

doc/readme/chap/pkuthss-chap2.tex

@@ -261,9 +261,9 @@
 \section{从其它文档类和宏包继承的功能}\label{sec:thirdparty}
 
 pkuthss 文档类建立在 ctexbook\supercite{ctex} 文档类之上，
-并调用了 CJKfntef、hyperref\supercite{hyperref}、%
-geometry\supercite{geometry}、fancyhdr\supercite{fancyhdr}
-和 graphicx\supercite{graphicx} 等几个宏包；
+并调用了 geometry\supercite{geometry}、fancyhdr\supercite{fancyhdr}、%
+hyperref\supercite{hyperref}、graphicx\supercite{graphicx}
+和 ulem\supercite{ulem} 等几个宏包；
 使用 \hologo{pdfLaTeX} 方式编译 GBK 编码的源文件时还会调用
 xCJK2uni\supercite{xCJK2uni} 宏包\footnote{%
 	ctex 2.x 会自行调用 xCJK2uni 宏包，

doc/readme/pkuthss.bib

@@ -158,6 +158,16 @@
 	language = {english},
 }
 
+@online{ulem,
+	author = {Arseneau, Donald},
+	title = {The ulem package: underlining for emphasis},
+	type = {M/OL},
+	date = {2011-03-18},
+	url = {http://mirror.ctan.org/macros/latex/contrib/ulem/},
+	urldate = {2016-06-22},
+	language = {english},
+}
+
 @online{xCJK2uni,
 	author = {李清},
 	title = {xCJK2uni 宏包（v0.1）},

tex/pkuthss.cls

@@ -66,9 +66,8 @@
 % Prevent fontspec (loaded by xeCJK) from interfering with newtxmath.
 \ifpkuthss@opt@pkufont\PassOptionsToPackage{no-math}{fontspec}\fi
 % pkuthss is based on ctexbook; we use `xiao 4' as default font size.
-% CJKfntef provides `\CJKunderline' used in `\maketitle'.
 % fancyhdr provides utilities for setting up headers and footers.
-\LoadClass[hyperref, cs4size, fntef, fancyhdr]{ctexbook}[2011/03/11]
+\LoadClass[hyperref, cs4size, fancyhdr]{ctexbook}[2011/03/11]
 % ctex 2.x no longer loads ifpdf and ifxetex by itself.
 \RequirePackage{ifpdf, ifxetex}
 % Provides support for `key = val' grammar.
@@ -77,7 +76,9 @@
 \RequirePackage{graphicx}[1999/02/16]
 % Provides utilities for setting up page layout.
 \RequirePackage{geometry}
-% `hyperref', `fntef', `fancyhdr' and `cs4size' are deprecated in ctex 2.x.
+% Provides `\uline' used in `\maketitle'.
+\RequirePackage{ulem}
+% `hyperref', `fancyhdr' and `cs4size' are deprecated in ctex 2.x.
 % hyperref now does not make citation hyperlinks if not explicitly loaded.
 % All compatibility support for ctex 1.x is scheduled for removal in 2017.
 % `\AtEndOfClass' used to avoid `PDF destination not defined' with setspace.
@@ -352,11 +353,11 @@
 		\loop\ifnum\pkuthss@tmp@linecount>0
 			% Fill specified space with underline on the bottom line. `\underline'
 			% draws line on the baseline (not the bottom line), and this is why
-			% `\CJKunderline' is used here instead.
+			% `\uline' is used here instead.
 			\ifnum\pkuthss@tmp@linecount=1
-				\CJKunderline{\makebox[#2]{}}
+				\uline{\makebox[#2]{}}
 			\else
-				\CJKunderline{\makebox[#2]{}}\\
+				\uline{\makebox[#2]{}}\\
 			\fi
 		\advance\pkuthss@tmp@linecount by -1\relax
 		\repeat%