diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4bffef..c0f0d88 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## Added
+
+- 新增对 `\noopsort` 的支持，与 `xampl.bib` 兼容（[CTeX-org/forum#315](https://github.com/CTeX-org/forum/issues/315)）。
+
 ## [v2.1.6] - 2024-03-08
 
 ## Added
diff --git a/gbt7714.dtx b/gbt7714.dtx
index dad5e23..7633f61 100644
--- a/gbt7714.dtx
+++ b/gbt7714.dtx
@@ -810,6 +810,15 @@
 %    \end{macrocode}
 % \end{environment}
 %
+% Patch \pkg{natbib} 内部命令，以支持 \cs{noopsort}。
+% 参考 \url{https://tex.stackexchange.com/a/39718/82731}。
+%    \begin{macrocode}
+\let\NAT@bare@aux\NAT@bare
+\def\NAT@bare#1(#2){%
+ \begingroup\edef\x{\endgroup
+   \unexpanded{\NAT@bare@aux#1}(\@firstofone#2)}\x}
+%    \end{macrocode}
+%
 % \begin{macro}{\url}
 % 使用 \pkg{xurl} 宏包的方法，增加 URL 可断行的位置。
 %    \begin{macrocode}
diff --git a/gbt7714.sty b/gbt7714.sty
index 2f92190..6ced533 100644
--- a/gbt7714.sty
+++ b/gbt7714.sty
@@ -293,6 +293,10 @@
        \if*#2*\else\textsuperscript{#2}\fi
      \fi}{#1}{#2}}
 \renewcommand\@biblabel[1]{[#1]\hfill}
+\let\NAT@bare@aux\NAT@bare
+\def\NAT@bare#1(#2){%
+ \begingroup\edef\x{\endgroup
+   \unexpanded{\NAT@bare@aux#1}(\@firstofone#2)}\x}
 \g@addto@macro\UrlBreaks{%
   \do0\do1\do2\do3\do4\do5\do6\do7\do8\do9%
   \do\A\do\B\do\C\do\D\do\E\do\F\do\G\do\H\do\I\do\J\do\K\do\L\do\M