diff --git a/README.md b/README.md
index 4cbc506..35dc682 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
 # echarts-map-tool
 
 A tool for [Apache ECharts (incubating)](https://github.com/apache/incubator-echarts) to generate China local geographic map data.
+
+## Notice
+
+The Apache Software Foundation [Apache ECharts, ECharts](https://echarts.apache.org/), Apache, the Apache feather, and the Apache ECharts project logo are either registered trademarks or trademarks of the [Apache Software Foundation](https://www.apache.org/).