Adjust links to 3.1 snapshots
diff --git a/README.md b/README.md
index 10060a4..3462db0 100644
--- a/README.md
+++ b/README.md
@@ -43,14 +43,14 @@
This project adheres to the Contributor Covenant [code of conduct](CODE_OF_CONDUCT.md). By participating, you are expected to uphold this code. Please report unacceptable behavior to wu.sheng@foxmail.com.
# Screenshots
-- Topological graph of application clusters based on dubbox and [motan](https://github.com/weibocom/motan).
-<img src="https://sky-walking.github.io/page-resources/3.1/topological_graph_test_project.png?forceUpdate=0"/>
-
- Topological graph of application clusters based on Spring Cloud.
<img src="https://sky-walking.github.io/page-resources/3.1/topological_graph.png?forceUpdate=0"/>
+- Topological graph of application clusters based on dubbox and [motan](https://github.com/weibocom/motan).
+<img src="https://sky-walking.github.io/page-resources/3.1/topological_graph_test_project.png?forceUpdate=0"/>
+
- Trace query.
-<img src="https://sky-walking.github.io/page-resources/3.0/trace_segment.png"/>
+<img src="https://sky-walking.github.io/page-resources/3.1/trace_segment.png"/>
- Span detail.
<img src="https://sky-walking.github.io/page-resources/3.0/span.png" />
