Update README.md

Author: JewelRoam

README.md

@@ -43,6 +43,10 @@ python -m graph_net.torch.validate \
   --model-path $GRAPH_NET_EXTRACT_WORKSPACE/resnet18/
 ```
 
+<div align="center">
+<img src="/pics/graphnet_sample.png" alt="GraphNet Extract Sample" width="65%">
+</div>
+
 **Step 1: graph_net.torch.extract**
 
 ```bash
@@ -122,6 +126,8 @@ The script is designed to process a file structure as ```/benchmark_path/compile
 
 **Vision**: GraphNet aims to lay the foundation for [ai4c](https://github.com/PaddlePaddle/ai4c) by enabling large-scale, systematic evaluation of tensor compiler optimizations.
 
+We aim to achieve cross-hardware portability of compiler optimizations by allowing models to learn and transfer optimization strategies. It will significantly reduce the manual effort required to develop efficient operator implementations.
+
 ## 💬 GraphNet Community
 
 You can join our community via following group chats. Welcome to ask any questions about using and building GraphNet.