Update README.md

Author: yushulx

examples/official/9.x/arm32_arm64/README.md

@@ -35,4 +35,7 @@ Use [dockerpi](https://github.com/lukechilds/dockerpi) to test the performance o
 ```bash
 docker run -it lukechilds/dockerpi pi2
 docker run -it lukechilds/dockerpi pi3
-```
+```
+
+## Blog
+[A Guide to Running ARM32 and ARM64 Python Barcode Readers in Docker Containers](https://www.dynamsoft.com/codepool/docker-arm64-arm32-python-barcode-qr-recognition.html)