diff --git a/README.md b/README.md
index 01a14fd..d4e417f 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ The built database provides tools for building training and test sets for ML app
 Powered by [MetaDrive Simulator](https://github.com/metadriverse/metadrive), the scenarios can be reconstructed for
 various applications like AD stack test, reinforcement learning, imitation learning, scenario generation and so on.
 
-![system](docs/asset/system_01.png)
+![system](docs/asset/system.png)
 
 ## Installation
 
diff --git a/docs/asset/system.png b/docs/asset/system.png
new file mode 100644
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Binary files /dev/null and b/docs/asset/system.png differ
diff --git a/documentation/simulation.rst b/documentation/simulation.rst
index d915e39..d86a852 100644
--- a/documentation/simulation.rst
+++ b/documentation/simulation.rst
@@ -2,4 +2,6 @@
 Simulation
 ###########
 
-Coming soon!
\ No newline at end of file
+Please checkout our colab examples at https://colab.research.google.com/github/metadriverse/scenarionet/blob/main/tutorial/simulation.ipynb
+
+More details about simulation will come soon!
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