diff --git a/gallery_dl/extractor/weibo.py b/gallery_dl/extractor/weibo.py
index 6b5ad9b1..6d433196 100644
--- a/gallery_dl/extractor/weibo.py
+++ b/gallery_dl/extractor/weibo.py
@@ -14,7 +14,7 @@ from ..cache import cache
 import random
 
 BASE_PATTERN = r"(?:https?://)?(?:www\.|m\.)?weibo\.c(?:om|n)"
-USER_PATTERN = BASE_PATTERN + r"/(?:(u|n|p(?:rofile)?)/)?([^/?#]+)(?:/home)?"
+USER_PATTERN = rf"{BASE_PATTERN}/(?:(u|n|p(?:rofile)?)/)?([^/?#]+)(?:/home)?"
 
 
 class WeiboExtractor(Extractor):
@@ -184,7 +184,7 @@ class WeiboExtractor(Extractor):
             return self.request_json(url)["data"]["user"]["idstr"]
 
     def _pagination(self, endpoint, params):
-        url = self.root + "/ajax" + endpoint
+        url = f"{self.root}/ajax{endpoint}"
         headers = {
             "X-Requested-With": "XMLHttpRequest",
             "X-XSRF-TOKEN": None,
@@ -265,7 +265,7 @@ class WeiboExtractor(Extractor):
 class WeiboUserExtractor(WeiboExtractor):
     """Extractor for weibo user profiles"""
     subcategory = "user"
-    pattern = USER_PATTERN + r"(?:$|#)"
+    pattern = rf"{USER_PATTERN}(?:$|#)"
     example = "https://weibo.com/USER"
 
     # do NOT override 'initialize()'
@@ -276,18 +276,18 @@ class WeiboUserExtractor(WeiboExtractor):
     def items(self):
         base = f"{self.root}/u/{self._user_id()}?tabtype="
         return Dispatch._dispatch_extractors(self, (
-            (WeiboHomeExtractor    , base + "home"),
-            (WeiboFeedExtractor    , base + "feed"),
-            (WeiboVideosExtractor  , base + "video"),
-            (WeiboNewvideoExtractor, base + "newVideo"),
-            (WeiboAlbumExtractor   , base + "album"),
+            (WeiboHomeExtractor    , f"{base}home"),
+            (WeiboFeedExtractor    , f"{base}feed"),
+            (WeiboVideosExtractor  , f"{base}video"),
+            (WeiboNewvideoExtractor, f"{base}newVideo"),
+            (WeiboAlbumExtractor   , f"{base}album"),
         ), ("feed",))
 
 
 class WeiboHomeExtractor(WeiboExtractor):
     """Extractor for weibo 'home' listings"""
     subcategory = "home"
-    pattern = USER_PATTERN + r"\?tabtype=home"
+    pattern = rf"{USER_PATTERN}\?tabtype=home"
     example = "https://weibo.com/USER?tabtype=home"
 
     def statuses(self):
@@ -299,7 +299,7 @@ class WeiboHomeExtractor(WeiboExtractor):
 class WeiboFeedExtractor(WeiboExtractor):
     """Extractor for weibo user feeds"""
     subcategory = "feed"
-    pattern = USER_PATTERN + r"\?tabtype=feed"
+    pattern = rf"{USER_PATTERN}\?tabtype=feed"
     example = "https://weibo.com/USER?tabtype=feed"
 
     def statuses(self):
@@ -311,7 +311,7 @@ class WeiboFeedExtractor(WeiboExtractor):
 class WeiboVideosExtractor(WeiboExtractor):
     """Extractor for weibo 'video' listings"""
     subcategory = "videos"
-    pattern = USER_PATTERN + r"\?tabtype=video"
+    pattern = rf"{USER_PATTERN}\?tabtype=video"
     example = "https://weibo.com/USER?tabtype=video"
 
     def statuses(self):
@@ -325,7 +325,7 @@ class WeiboVideosExtractor(WeiboExtractor):
 class WeiboNewvideoExtractor(WeiboExtractor):
     """Extractor for weibo 'newVideo' listings"""
     subcategory = "newvideo"
-    pattern = USER_PATTERN + r"\?tabtype=newVideo"
+    pattern = rf"{USER_PATTERN}\?tabtype=newVideo"
     example = "https://weibo.com/USER?tabtype=newVideo"
 
     def statuses(self):
@@ -337,7 +337,7 @@ class WeiboNewvideoExtractor(WeiboExtractor):
 class WeiboArticleExtractor(WeiboExtractor):
     """Extractor for weibo 'article' listings"""
     subcategory = "article"
-    pattern = USER_PATTERN + r"\?tabtype=article"
+    pattern = rf"{USER_PATTERN}\?tabtype=article"
     example = "https://weibo.com/USER?tabtype=article"
 
     def statuses(self):
@@ -349,7 +349,7 @@ class WeiboArticleExtractor(WeiboExtractor):
 class WeiboAlbumExtractor(WeiboExtractor):
     """Extractor for weibo 'album' listings"""
     subcategory = "album"
-    pattern = USER_PATTERN + r"\?tabtype=album"
+    pattern = rf"{USER_PATTERN}\?tabtype=album"
     example = "https://weibo.com/USER?tabtype=album"
 
     def statuses(self):
@@ -369,9 +369,9 @@ class WeiboAlbumExtractor(WeiboExtractor):
 
 
 class WeiboStatusExtractor(WeiboExtractor):
-    """Extractor for images from a status on weibo.cn"""
+    """Extractor for a weibo status"""
     subcategory = "status"
-    pattern = BASE_PATTERN + r"/(detail|status|\d+)/(\w+)"
+    pattern = rf"{BASE_PATTERN}/(detail|status|\d+)/(\w+)"
     example = "https://weibo.com/detail/12345"
 
     def statuses(self):