diff --git a/examples/threadpool-example/config/config-apollo/src/main/resources/bootstrap.properties b/examples/threadpool-example/config/config-apollo/src/main/resources/bootstrap.properties
index 9a4d194f..933209fd 100644
--- a/examples/threadpool-example/config/config-apollo/src/main/resources/bootstrap.properties
+++ b/examples/threadpool-example/config/config-apollo/src/main/resources/bootstrap.properties
@@ -7,7 +7,7 @@ apollo.autoUpdateInjectedSpringProperties=true
 apollo.bootstrap.enabled=true
 apollo.bootstrap.namespaces=application
 apollo.bootstrap.eagerLoad.enabled=true
-#
+# The following parameters are used for testing
 env=dev
 apollo.configService=http://127.0.0.1:8080