diff --git a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/BUILD.gn b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/BUILD.gn
old mode 100644
new mode 100755
index 6ff04d1f2958a39821a1fa3f11528651eebfce92..4f305a61277d40e551e6fec06de22f52ac8c57da
--- a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/BUILD.gn
+++ b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/BUILD.gn
@@ -27,7 +27,7 @@ static_library("iot_mqtt") {
         "//vendor/hisi/hi3861/hi3861/third_party/lwip_sack/include/",
         "//third_party/cJSON",
         "//third_party/paho_mqtt/MQTTPacket/src",
-        "//third_party/paho_mqtt/MQTTPacket/samples",
+        "//third_party/paho_mqtt/MQTTClient-C/src",
         "include"
     ]
 
diff --git a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/README.md b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/README.md
old mode 100644
new mode 100755
diff --git a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/include/wifi_connect.h b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/include/wifi_connect.h
old mode 100644
new mode 100755
diff --git a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/iot_mqtt.c b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/iot_mqtt.c
old mode 100644
new mode 100755
diff --git a/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/src/wifi_connect.c b/applications/BearPi/BearPi-HM_Nano/sample/D5_iot_mqtt/src/wifi_connect.c
old mode 100644
new mode 100755
diff --git a/third_party/paho_mqtt/MQTTClient-C/src/liteOS/MQTTLiteOS.c b/third_party/paho_mqtt/MQTTClient-C/src/liteOS/MQTTLiteOS.c
old mode 100644
new mode 100755
index 47938645d369724149236bad06ed8153bb328764..1c21f83317bab039beda5e172238015b32fbf658
--- a/third_party/paho_mqtt/MQTTClient-C/src/liteOS/MQTTLiteOS.c
+++ b/third_party/paho_mqtt/MQTTClient-C/src/liteOS/MQTTLiteOS.c
@@ -202,5 +202,5 @@ int NetworkConnect(Network* n, char* addr, int port)
 
 void NetworkDisconnect(Network* n)
 {
-	close(n->my_socket);
+	lwip_close(n->my_socket);
 }