diff --git a/books/models.py b/books/models.py
index 06ed574f..746ac1b6 100644
--- a/books/models.py
+++ b/books/models.py
@@ -122,6 +122,11 @@ class Book(Entity):
     def mark_class(self):
         return BookMark
 
+    @property
+    def tag_class(self):
+        return BookTag
+
+
 class BookMark(Mark):
     book = models.ForeignKey(
         Book, on_delete=models.CASCADE, related_name='book_marks', null=True)
diff --git a/common/models.py b/common/models.py
index 2cbec5b8..07d2261e 100644
--- a/common/models.py
+++ b/common/models.py
@@ -192,6 +192,10 @@ class Entity(models.Model):
     def mark_class(self):
         raise NotImplementedError("Subclass should implement this.")
 
+    @property
+    def tag_class(self):
+        raise NotImplementedError("Subclass should implement this.")
+
 
 class UserOwnedEntity(models.Model):
     is_private = models.BooleanField(default=False, null=True)  # first set allow null, then migration, finally (in a few days) remove for good
@@ -281,6 +285,11 @@ class Mark(UserOwnedEntity):
     def translated_status(self):
         raise NotImplementedError("Subclass should implement this.")
 
+    @property
+    def tags(self):
+        tags = self.item.tag_class.objects.filter(mark_id=self.id)
+        return tags
+
     class Meta:
         abstract = True
         constraints = [
diff --git a/games/models.py b/games/models.py
index a47e8104..c51e2981 100644
--- a/games/models.py
+++ b/games/models.py
@@ -108,6 +108,10 @@ class Game(Entity):
     def mark_class(self):
         return GameMark
 
+    @property
+    def tag_class(self):
+        return GameTag
+
 
 class GameMark(Mark):
     game = models.ForeignKey(
diff --git a/movies/models.py b/movies/models.py
index 63a7523c..70b4b7c6 100644
--- a/movies/models.py
+++ b/movies/models.py
@@ -235,6 +235,10 @@ class Movie(Entity):
     def mark_class(self):
         return MovieMark
 
+    @property
+    def tag_class(self):
+        return MovieTag
+
 
 class MovieMark(Mark):
     movie = models.ForeignKey(Movie, on_delete=models.CASCADE, related_name='movie_marks', null=True)
diff --git a/music/models.py b/music/models.py
index 11a931ca..9afa0b53 100644
--- a/music/models.py
+++ b/music/models.py
@@ -87,6 +87,10 @@ class Album(Entity):
     def mark_class(self):
         return AlbumMark
 
+    @property
+    def tag_class(self):
+        return AlbumTag
+
 
 class Song(Entity):
     '''
@@ -142,6 +146,10 @@ class Song(Entity):
     def mark_class(self):
         return SongMark
 
+    @property
+    def tag_class(self):
+        return SongTag
+
 
 class SongMark(Mark):
     song = models.ForeignKey(
diff --git a/users/export.py b/users/export.py
index 65faab6d..372285d5 100644
--- a/users/export.py
+++ b/users/export.py
@@ -48,7 +48,7 @@ def export_marks_task(user):
             movie = mark.movie
             title = movie.title
             summary = str(movie.year) + ' / ' + ','.join(movie.area) + ' / ' + ','.join(map(lambda x: str(MovieGenreTranslator[x]), movie.genre)) + ' / ' + ','.join(movie.director) + ' / ' + ','.join(movie.actor)
-            tags = ','.join(list(set(map(lambda t: t['content'], movie.get_tags_manager().values()))))
+            tags = ','.join(list(map(lambda m: m.content, mark.tags)))
             world_rating = (movie.rating / 2) if movie.rating else None
             timestamp = mark.edited_time.strftime('%Y-%m-%d %H:%M:%S')
             my_rating = (mark.rating / 2) if mark.rating else None
@@ -66,7 +66,7 @@ def export_marks_task(user):
             album = mark.album
             title = album.title
             summary = ','.join(album.artist) + ' / ' + (album.release_date.strftime('%Y') if album.release_date else '')
-            tags = ','.join(list(set(map(lambda t: t['content'], album.get_tags_manager().values()))))
+            tags = ','.join(list(map(lambda m: m.content, mark.tags)))
             world_rating = (album.rating / 2) if album.rating else None
             timestamp = mark.edited_time.strftime('%Y-%m-%d %H:%M:%S')
             my_rating = (mark.rating / 2) if mark.rating else None
@@ -84,7 +84,7 @@ def export_marks_task(user):
             book = mark.book
             title = book.title
             summary = ','.join(book.author) + ' / ' + str(book.pub_year) + ' / ' + book.pub_house
-            tags = ','.join(list(set(map(lambda t: t['content'], book.get_tags_manager().values()))))
+            tags = ','.join(list(map(lambda m: m.content, mark.tags)))
             world_rating = (book.rating / 2) if book.rating else None
             timestamp = mark.edited_time.strftime('%Y-%m-%d %H:%M:%S')
             my_rating = (mark.rating / 2) if mark.rating else None
@@ -102,7 +102,7 @@ def export_marks_task(user):
             game = mark.game
             title = game.title
             summary = ','.join(game.genre) + ' / ' + ','.join(game.platform) + ' / ' + (game.release_date.strftime('%Y-%m-%d') if game.release_date else '')
-            tags = ','.join(list(set(map(lambda t: t['content'], game.get_tags_manager().values()))))
+            tags = ','.join(list(map(lambda m: m.content, mark.tags)))
             world_rating = (game.rating / 2) if game.rating else None
             timestamp = mark.edited_time.strftime('%Y-%m-%d %H:%M:%S')
             my_rating = (mark.rating / 2) if mark.rating else None