diff --git a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
index c065f24..07efd11 100644
--- a/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
+++ b/src/main/java/com/teaching/backend/service/impl/courses/CoursesServiceImpl.java
@@ -307,7 +307,7 @@ public class CoursesServiceImpl extends ServiceImpl<CoursesMapper, Courses> impl
 
             item.setTotalHours(countHours(item.getId()));
             item.setTotalchapter(countChapters(item.getId()));
-            item.setTotalKnow(countKnow(item.getId()));
+            item.setTotalKnow(countHours(item.getId()));
             return item;
         }).collect(Collectors.toList());