diff --git a/lib/Xtc/Xtc/XtcTypes.h b/lib/Xtc/Xtc/XtcTypes.h
index de613552..cff832cb 100644
--- a/lib/Xtc/Xtc/XtcTypes.h
+++ b/lib/Xtc/Xtc/XtcTypes.h
@@ -101,11 +101,11 @@ struct ChapterInfo {
   uint16_t startPage;
   uint16_t endPage;
 };
-
+//new struct 
 struct ChapterData {
-    int chapterIndex;        // 章节序号
-    uint16_t startPage;     // 字节偏移量
-    char shortTitle[64]; // 截取后的标题，char数组格式
+    int chapterIndex;        
+    uint16_t startPage;     
+    char shortTitle[64]; 
 };
 
 // Error codes