diff --git a/pangu-spacing.el b/pangu-spacing.el
index 4c7157a..f36ba6d 100644
--- a/pangu-spacing.el
+++ b/pangu-spacing.el
@@ -158,7 +158,6 @@ When you set t here, the space will be insert when you save file."
   :type 'list)
 
 ;;;; Local variables
-
 ;; NOTE:
 ;; We use `chinse-two-byte' instead of `chinese-two-byte', since there
 ;; are some typo in emacs version 21.1-24.3. For more information,
@@ -167,19 +166,25 @@ When you set t here, the space will be insert when you save file."
 ;;   [Emacs-diffs] trunk r115873: Fix misspelling of 'chinese' in rx.
 ;;
 ;; Url: http://lists.gnu.org/archive/html/emacs-diffs/2014-01/msg00049.html
+;;
+(defun pangu-spacing-chinese-two-byte-category ()
+  "Return the correct category name for Chinese two-byte characters."
+  (if (assq 'chinese-two-byte rx--categories)
+      "chinese-two-byte"
+    "chinse-two-byte"))
 
 (defvar pangu-spacing-include-regexp
   ;; we didn't add korean because korean-hangul-two-byte is not implemented
-  (rx (or (and (or (group-n 3 (any "。，！？；：「」（）、"))
-                   (group-n 1 (or (category chinse-two-byte)
-                                  (category japanese-hiragana-two-byte)
-                                  (category japanese-katakana-two-byte))))
-               (group-n 2 (in "a-zA-Z0-9")))
-          (and (group-n 1 (in "a-zA-Z0-9"))
-               (or (group-n 3 (any "。，！？；：「」（）、"))
-                   (group-n 2 (or (category chinse-two-byte)
-                                  (category japanese-hiragana-two-byte)
-                                  (category japanese-katakana-two-byte)))))))
+  (eval `(rx (or (and (or (group-n 3 (any "。，！？；：「」（）、"))
+                          (group-n 1 (or (category ,(intern (pangu-spacing-chinese-two-byte-category)))
+                                         (category japanese-hiragana-two-byte)
+                                         (category japanese-katakana-two-byte))))
+                      (group-n 2 (in "a-zA-Z0-9")))
+                 (and (group-n 1 (in "a-zA-Z0-9"))
+                      (or (group-n 3 (any "。，！？；：「」（）、"))
+                          (group-n 2 (or (category ,(intern (pangu-spacing-chinese-two-byte-category)))
+                                         (category japanese-hiragana-two-byte)
+                                         (category japanese-katakana-two-byte))))))))
   "Regexp to find Chinese character before English character.
 
 Group 1 contains the character before the potential pangu
@@ -212,14 +217,14 @@ pangu-spacing-mode."
   "Helper macro to search and update overlay according func and regexp for
 pangu-sapce-mode."
   `(pangu-spacing-search-buffer ,regexp ,beg ,end
-                                  (,func (match-beginning 1) (match-end 1))))
+                                (,func (match-beginning 1) (match-end 1))))
 
 (defun pangu-spacing-org-mode-at-special-region ()
   (interactive)
   (let ((element (org-element-at-point)))
     (when (or (member (org-element-type element)
                       '(src-block keyword example-block export-block
-                                  latex-environment planning))
+                        latex-environment planning))
               (member (car (org-element-context element))
                       '(inline-src-block timestamp link code verbatim)))
       t)))
@@ -230,7 +235,7 @@ pangu-sapce-mode."
   check for special region that shall not write real pangu-space"
   :group 'pangu-spacing
   :type '(alist :key-type (symbol)
-                :value-type (function)))
+          :value-type (function)))
 
 (defun pangu-spacing-search-and-replace (match regexp)
   "Replace regexp with match in buffer."