diff --git a/example/mica-mqtt-example/src/main/java/net/dreamlu/iot/mqtt/proxy/MqttClientProxy.java b/example/mica-mqtt-example/src/main/java/net/dreamlu/iot/mqtt/proxy/MqttClientProxy.java
new file mode 100644
index 00000000..a92b016a
--- /dev/null
+++ b/example/mica-mqtt-example/src/main/java/net/dreamlu/iot/mqtt/proxy/MqttClientProxy.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2019-2029, Dreamlu 卢春梦 (596392912@qq.com & dreamlu.net).
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.dreamlu.iot.mqtt.proxy;
+
+import net.dreamlu.iot.mqtt.codec.MqttQoS;
+import net.dreamlu.iot.mqtt.core.client.MqttClient;
+
+/**
+ * 2 个 mqtt 服务间，使用 2 个 client 做数据传输
+ *
+ * @author L.cm
+ */
+public class MqttClientProxy {
+
+	public static void main(String[] args) {
+		MqttClient client1 = MqttClient.create()
+			.ip("ip1")
+			.port(1883)
+			.clientId("clientI")
+			.username("admin&admin")
+			.password("6b408b34171b0423160dcb8b70decefe")
+			.debug()
+			.connectSync();
+
+		MqttClient client2 = MqttClient.create()
+			.ip("ip2")
+			.port(1883)
+			.clientId("client2")
+			.username("admin&admin")
+			.password("6b408b34171b0423160dcb8b70decefe")
+			.debug()
+			.connectSync();
+
+		String[] topics = new String[]{
+			"$share/test/link/product1/+/event/+/post",
+			"$share/test/link/product2/+/event/+/post",
+			"$share/test/link/product3/+/event/+/post"
+		};
+		client1.subscribe(topics, MqttQoS.AT_MOST_ONCE, (context, topic, message, payload) -> {
+			client2.publish(topic, payload);
+		});
+	}
+
+}