* MDF [nanomq.conf] add explantion of bridging qos
@@ -584,7 +584,8 @@ bridge.mqtt.emqx.forwards=topic1/#,topic2/#
bridge.mqtt.emqx.subscription.1.topic=cmd/topic1
## Need to subscribe to remote topics QoS.
-##
+## Please set QoS for each subscription topic
+## otherwise topic is invalid, NanoMQ won't sub to any topic
## Value: Number
bridge.mqtt.emqx.subscription.1.qos=1
