diff --git a/PPOCRLabel/PPOCRLabel.py b/PPOCRLabel/PPOCRLabel.py
index 523661b635ed4eaaf8d2b4ac05aaf60b2abc8541..7c7802a73ed32680142f8119b10a0393d1fab9cc 100644
--- a/PPOCRLabel/PPOCRLabel.py
+++ b/PPOCRLabel/PPOCRLabel.py
@@ -1439,8 +1439,8 @@ class MainWindow(QMainWindow):
                                DEFAULT_LOCK_COLOR, key_cls, box['difficult']))
         if imgidx in self.PPlabel.keys():
             for box in self.PPlabel[imgidx]:
-                key_cls = None if not self.kie_mode else box['key_cls']
-                shapes.append((box['transcription'], box['points'], None, key_cls, box['difficult']))
+                key_cls = None if not self.kie_mode else box.get('key_cls', 'None')
+                shapes.append((box['transcription'], box['points'], None, key_cls, box.get('difficult', False)))
 
         self.loadLabels(shapes)
         self.canvas.verified = False
@@ -1584,7 +1584,7 @@ class MainWindow(QMainWindow):
         for image, info in label_dict.items():
             for box in info:
                 if "key_cls" not in box:
-                    continue
+                    box.update({"key_cls": "None"})
                 self.existed_key_cls_set.add(box["key_cls"])
         if len(self.existed_key_cls_set) > 0:
             for key_text in self.existed_key_cls_set:
@@ -1606,8 +1606,6 @@ class MainWindow(QMainWindow):
                 fit_to_content={'column': True, 'row': False},
                 flags=None
             )
-        else:
-            self.keyDialog.labelList.addItems(self.existed_key_cls_set)
 
     def importDirImages(self, dirpath, isDelete=False):
         if not self.mayContinue() or not dirpath:
diff --git a/PPOCRLabel/README.md b/PPOCRLabel/README.md
index 0a1a7536912b6591517050bfa62260aaef6077cd..95baf66b297bb17b9396a20b8aa156fbd8273e39 100644
--- a/PPOCRLabel/README.md
+++ b/PPOCRLabel/README.md
@@ -12,6 +12,7 @@ PPOCRLabel is a semi-automatic graphic annotation tool suitable for OCR field, w
   - Add KIE Mode by using `--kie`, for [detection + identification + keyword extraction] labeling.
 - 2022.01：（by [PeterH0323](https://github.com/peterh0323) ）
   - Improve user experience: prompt for the number of files and labels, optimize interaction, and fix bugs such as only use CPU when inference
+  - New functions: Support using `C` or `X` to rotate box.
 - 2021.11.17:
   - Support install and start PPOCRLabel through the whl package (by [d2623587501](https://github.com/d2623587501))
   - Dataset segmentation: Divide the annotation file into training, verification and testing parts (refer to section 3.5 below, by [MrCuiHao](https://github.com/MrCuiHao))
diff --git a/PPOCRLabel/README_ch.md b/PPOCRLabel/README_ch.md
index 99c088de83f9cba775733a0473b50596683c47ab..5534b308f3b49905bfaa33b24e128e2bbcc1ef5b 100644
--- a/PPOCRLabel/README_ch.md
+++ b/PPOCRLabel/README_ch.md
@@ -11,7 +11,8 @@ PPOCRLabel是一款适用于OCR领域的半自动化图形标注工具，内置P
 - 2022.02：（by [PeterH0323](https://github.com/peterh0323) ）
   - 新增：使用 `--kie` 进入 KIE 功能，用于打【检测+识别+关键字提取】的标签
 - 2022.01：（by [PeterH0323](https://github.com/peterh0323) ）
-  - 提升用户体验：新增文件与标记数目提示、优化交互、修复gpu使用等问题
+  - 提升用户体验：新增文件与标记数目提示、优化交互、修复gpu使用等问题。
+  - 新增功能：使用 `C` 和 `X` 对标记框进行旋转。
 - 2021.11.17：
   - 新增支持通过whl包安装和启动PPOCRLabel（by [d2623587501](https://github.com/d2623587501)）
   - 标注数据集切分：对标注数据进行训练、验证与测试集划分（参考下方3.5节，by [MrCuiHao](https://github.com/MrCuiHao)）