diff --git a/NOTICE b/NOTICE
index 85e2dc3..65ebdd0 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache RocketMQ
-Copyright 2016-2019 The Apache Software Foundation
+Copyright 2016-2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/README.md b/README.md
index 2f7ba86..d4fdfa8 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 [![License](https://img.shields.io/badge/license-Apache%202-4EB1BA.svg)](https://www.apache.org/licenses/LICENSE-2.0.html)
 [![TravisCI](https://travis-ci.org/apache/rocketmq-client-go.svg)](https://travis-ci.org/apache/rocketmq-client-go)
 [![Coverage](https://codecov.io/gh/apache/rocketmq-client-go/branch/native/graph/badge.svg)](https://codecov.io/gh/apache/rocketmq-client-go/branch/native)
+[![GitHub release](https://img.shields.io/badge/release-download-default.svg)](https://github.com/apache/rocketmq-client-go/releases)
+[![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/apache/rocketmq-client-go.svg)](http://isitmaintained.com/project/apache/rocketmq-client-go "Average time to resolve an issue")
+[![Percentage of issues still open](http://isitmaintained.com/badge/open/apache/rocketmq-client-go.svg)](http://isitmaintained.com/project/apache/rocketmq-client-go "Percentage of issues still open")
+![Twitter Follow](https://img.shields.io/twitter/follow/ApacheRocketMQ?style=social)
 
 The RocketMQ Client in pure go, the project is developing, **there is no any guarantee in production environment**. in next versions,
 we will do our best to improve reliability, stability, usability and performance. the API may be changed, and more features will be added.
@@ -9,14 +13,15 @@
 optimization, documents, etc. so, any contribution is very welcome. if you want do something, please browse issue list and select one,
 or create a new issue.
 
-- [2.0.0 Production Ready Road map](https://github.com/apache/rocketmq-client-go/v2/issues/57)
-- [The alpha1 feature list](https://github.com/apache/rocketmq-client-go/v2/issues/54)
+- [2.0.0 Production Ready Road map](https://github.com/apache/rocketmq-client-go/issues/57)
 
 ----------
 ## Features
-in 2.0.0-alpha1, support:
+in 2.0.0-rc1, support:
 * sending message in synchronous mode
+* sending message in asynchronous mode
 * sending message in oneway mode
+* sending orderly messages
 * consuming message using push model
 
 ----------
diff --git a/consumer/consumer.go b/consumer/consumer.go
index 25f7060..5a5d7d6 100644
--- a/consumer/consumer.go
+++ b/consumer/consumer.go
@@ -61,8 +61,8 @@
 type ConsumeType string
 
 const (
-	_PullConsume = ConsumeType("pull")
-	_PushConsume = ConsumeType("push")
+	_PullConsume = ConsumeType("CONSUME_ACTIVELY")
+	_PushConsume = ConsumeType("CONSUME_PASSIVELY")
 
 	_SubAll = "*"
 )
@@ -268,6 +268,8 @@
 	prCh chan PullRequest
 
 	namesrv internal.Namesrvs
+
+	pullFromWhichNodeTable sync.Map
 }
 
 func (dc *defaultConsumer) start() error {
@@ -855,7 +857,7 @@
 
 func (dc *defaultConsumer) processPullResult(mq *primitive.MessageQueue, result *primitive.PullResult, data *internal.SubscriptionData) {
 
-	updatePullFromWhichNode(mq, result.SuggestWhichBrokerId)
+	dc.updatePullFromWhichNode(mq, result.SuggestWhichBrokerId)
 
 	switch result.Status {
 	case primitive.PullFound:
@@ -1041,24 +1043,20 @@
 }
 
 func (dc *defaultConsumer) tryFindBroker(mq *primitive.MessageQueue) *internal.FindBrokerResult {
-	result := dc.namesrv.FindBrokerAddressInSubscribe(mq.BrokerName, recalculatePullFromWhichNode(mq), false)
+	result := dc.namesrv.FindBrokerAddressInSubscribe(mq.BrokerName, dc.recalculatePullFromWhichNode(mq), false)
 	if result != nil {
 		return result
 	}
 	dc.namesrv.UpdateTopicRouteInfo(mq.Topic)
-	return dc.namesrv.FindBrokerAddressInSubscribe(mq.BrokerName, recalculatePullFromWhichNode(mq), false)
+	return dc.namesrv.FindBrokerAddressInSubscribe(mq.BrokerName, dc.recalculatePullFromWhichNode(mq), false)
 }
 
-var (
-	pullFromWhichNodeTable sync.Map
-)
-
-func updatePullFromWhichNode(mq *primitive.MessageQueue, brokerId int64) {
-	pullFromWhichNodeTable.Store(*mq, brokerId)
+func (dc *defaultConsumer) updatePullFromWhichNode(mq *primitive.MessageQueue, brokerId int64) {
+	dc.pullFromWhichNodeTable.Store(*mq, brokerId)
 }
 
-func recalculatePullFromWhichNode(mq *primitive.MessageQueue) int64 {
-	v, exist := pullFromWhichNodeTable.Load(*mq)
+func (dc *defaultConsumer) recalculatePullFromWhichNode(mq *primitive.MessageQueue) int64 {
+	v, exist := dc.pullFromWhichNodeTable.Load(*mq)
 	if exist {
 		return v.(int64)
 	}