diff --git a/README.md b/README.md
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--- a/README.md
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@@ -1 +1,3 @@
 # test3
+
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/9abf801e97264cb28530bca008eb2124)](https://app.codacy.com/app/wangch64/test3?utm_source=github.com&utm_medium=referral&utm_content=wangch64/test3&utm_campaign=Badge_Grade_Settings)