Delete ch_doc2.jpg
diff --git a/doc/datasets/ch_doc2.jpg b/doc/datasets/ch_doc2.jpg
deleted file mode 100644
index 23343b8ded..0000000000
Binary files a/doc/datasets/ch_doc2.jpg and /dev/null differ
diff --git a/doc/doc_ch/datasets.md b/doc/doc_ch/datasets.md
index 6d84dbbe48..d365fd711a 100644
--- a/doc/doc_ch/datasets.md
+++ b/doc/doc_ch/datasets.md
@@ -49,7 +49,6 @@ https://aistudio.baidu.com/aistudio/datasetdetail/8429
     - 每个样本固定10个字符，字符随机截取自语料库中的句子
     - 图片分辨率统一为280x32  
     ![](../datasets/ch_doc1.jpg)  
-    ![](../datasets/ch_doc2.jpg)  
     ![](../datasets/ch_doc3.jpg)  
 - **下载地址**：https://pan.baidu.com/s/1QkI7kjah8SPHwOQ40rS1Pw (密码：lu7m)
 
diff --git a/doc/doc_en/datasets_en.md b/doc/doc_en/datasets_en.md
index 61d2033b4f..0e6b6f381e 100644
--- a/doc/doc_en/datasets_en.md
+++ b/doc/doc_en/datasets_en.md
@@ -50,7 +50,6 @@ https://aistudio.baidu.com/aistudio/datasetdetail/8429
     - Each sample is fixed with 10 characters, and the characters are randomly intercepted from the sentences in the corpus
     - Image resolution is 280x32  
     ![](../datasets/ch_doc1.jpg)  
-    ![](../datasets/ch_doc2.jpg)  
     ![](../datasets/ch_doc3.jpg)  
 - **Download link**：https://pan.baidu.com/s/1QkI7kjah8SPHwOQ40rS1Pw (Password: lu7m)
 
