fix the default port of namesrv
diff --git a/examples/orderproducer/producer.go b/examples/orderproducer/producer.go
index f8cc402..d3ecf42 100644
--- a/examples/orderproducer/producer.go
+++ b/examples/orderproducer/producer.go
@@ -49,7 +49,7 @@
 }
 
 // example:
-// ./producer -n "localhost:9988" -t local_test -g local_test -d data -m 100 -w 10
+// ./producer -n "localhost:9876" -t local_test -g local_test -d data -m 100 -w 10
 func main() {
 	flag.Parse()