diff --git a/doc/doc_en/ocr_book_en.md b/doc/doc_en/ocr_book_en.md
index 9d202f1cb45ba53bddbd12e997720ec1b77108bd..6bd2705a6935d05334ebbddf64843fc20297de9d 100644
--- a/doc/doc_en/ocr_book_en.md
+++ b/doc/doc_en/ocr_book_en.md
@@ -20,6 +20,6 @@
 
 
 ## Address
-- [E-book: *Dive Into OCR* ](https://paddleocr.bj.bcebos.com/ebook/Dive_into_OCR.pdf)
-- [Jupyter notebook](https://github.com/PaddleOCR-Community/Dive-into-OCR)
+- [E-book: *Dive Into OCR* (PDF)](https://paddleocr.bj.bcebos.com/ebook/Dive_into_OCR.pdf)
+- [Notebook (.ipynb)](https://github.com/PaddleOCR-Community/Dive-into-OCR)
 - [Videos (Chinese only)](https://aistudio.baidu.com/aistudio/education/group/info/25207)