Add description of make command
@@ -238,6 +238,7 @@ After the above steps are completed, you can use adb to push the file to the pho
```
# Execute the compilation and get the executable file ocr_db_crnn
+ # The first execution of this command will download dependent libraries such as opencv. After the download is complete, you need to execute it again
make -j
# Move the compiled executable file to the debug folder
mv ocr_db_crnn ./debug/
