diff --git a/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/PersistentTopicsBase.java b/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/PersistentTopicsBase.java
index 0573023..fcf8e96 100644
--- a/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/PersistentTopicsBase.java
+++ b/pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/PersistentTopicsBase.java
@@ -34,6 +34,7 @@
 import java.util.Base64;
 import java.util.Collections;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -526,7 +527,14 @@
                                 if (!policies.isPresent()) {
                                     return CompletableFuture.completedFuture(null);
                                 }
-                                final Set<String> replicationClusters = policies.get().replication_clusters;
+                                // Combine namespace level policies and topic level policies.
+                                Set<String> replicationClusters = policies.get().replication_clusters;
+                                TopicPolicies topicPolicies =
+                                        pulsarService.getTopicPoliciesService().getTopicPoliciesIfExists(topicName);
+                                if (topicPolicies != null) {
+                                    replicationClusters = new HashSet<>(topicPolicies.getReplicationClusters());
+                                }
+                                // Do check replicated clusters.
                                 if (replicationClusters.size() == 0) {
                                     return CompletableFuture.completedFuture(null);
                                 }
@@ -542,6 +550,7 @@
                                     // The replication clusters just has the current cluster itself.
                                     return CompletableFuture.completedFuture(null);
                                 }
+                                // Do sync operation to other clusters.
                                 List<CompletableFuture<Void>> futures = replicationClusters.stream()
                                         .map(replicationCluster -> admin.clusters().getClusterAsync(replicationCluster)
                                                 .thenCompose(clusterData -> pulsarService.getBrokerService()
diff --git a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTest.java b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTest.java
index 771981d..34b6332 100644
--- a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTest.java
+++ b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTest.java
@@ -466,8 +466,17 @@
         admin2.topics().createPartitionedTopic(topicName, 2);
         admin1.topics().setReplicationClusters(topicName, Arrays.asList(cluster1, cluster2));
         // Check the partitioned topic has been created at the remote cluster.
-        PartitionedTopicMetadata topicMetadata2 = admin2.topics().getPartitionedTopicMetadata(topicName);
-        assertEquals(topicMetadata2.partitions, 2);
+        Awaitility.await().untilAsserted(() -> {
+            PartitionedTopicMetadata topicMetadata2 = admin2.topics().getPartitionedTopicMetadata(topicName);
+            assertEquals(topicMetadata2.partitions, 2);
+        });
+
+        // Expand partitions
+        admin2.topics().updatePartitionedTopic(topicName, 3);
+        Awaitility.await().untilAsserted(() -> {
+            PartitionedTopicMetadata topicMetadata2 = admin2.topics().getPartitionedTopicMetadata(topicName);
+            assertEquals(topicMetadata2.partitions, 3);
+        });
         // cleanup.
         admin1.topics().setReplicationClusters(topicName, Arrays.asList(cluster1));
         waitReplicatorStopped(partition0);
@@ -717,4 +726,56 @@
                     .persistentTopicExists(TopicName.get(topicName).getPartition(1)).join());
         }
     }
+
+    @Test
+    public void testNoExpandTopicPartitionsWhenDisableTopicLevelReplication() throws Exception {
+        final String topicName = BrokerTestUtil.newUniqueName("persistent://" + replicatedNamespace + "/tp_");
+        admin1.topics().createPartitionedTopic(topicName, 2);
+
+        // Verify replicator works.
+        verifyReplicationWorks(topicName);
+
+        // Disable topic level replication.
+        setTopicLevelClusters(topicName, Arrays.asList(cluster1), admin1, pulsar1);
+        setTopicLevelClusters(topicName, Arrays.asList(cluster2), admin2, pulsar2);
+
+        // Expand topic.
+        admin1.topics().updatePartitionedTopic(topicName, 3);
+        assertEquals(admin1.topics().getPartitionedTopicMetadata(topicName).partitions, 3);
+
+        // Wait for async tasks that were triggered by expanding topic partitions.
+        Thread.sleep(3 * 1000);
+
+
+        // Verify: the topics on the remote cluster did not been expanded.
+        assertEquals(admin2.topics().getPartitionedTopicMetadata(topicName).partitions, 2);
+
+        cleanupTopics(() -> {
+            admin1.topics().deletePartitionedTopic(topicName, false);
+            admin2.topics().deletePartitionedTopic(topicName, false);
+        });
+    }
+
+    @Test
+    public void testExpandTopicPartitionsOnNamespaceLevelReplication() throws Exception {
+        final String topicName = BrokerTestUtil.newUniqueName("persistent://" + replicatedNamespace + "/tp_");
+        admin1.topics().createPartitionedTopic(topicName, 2);
+
+        // Verify replicator works.
+        verifyReplicationWorks(topicName);
+
+        // Expand topic.
+        admin1.topics().updatePartitionedTopic(topicName, 3);
+        assertEquals(admin1.topics().getPartitionedTopicMetadata(topicName).partitions, 3);
+
+        // Verify: the topics on the remote cluster will be expanded.
+        Awaitility.await().untilAsserted(() -> {
+            assertEquals(admin2.topics().getPartitionedTopicMetadata(topicName).partitions, 3);
+        });
+
+        cleanupTopics(() -> {
+            admin1.topics().deletePartitionedTopic(topicName, false);
+            admin2.topics().deletePartitionedTopic(topicName, false);
+        });
+    }
 }
diff --git a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTestBase.java b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTestBase.java
index 6a84432..7372b2e 100644
--- a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTestBase.java
+++ b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorTestBase.java
@@ -196,9 +196,16 @@
     }
 
     protected void waitChangeEventsInit(String namespace) {
-        PersistentTopic topic = (PersistentTopic) pulsar1.getBrokerService()
-                .getTopic(namespace + "/" + SystemTopicNames.NAMESPACE_EVENTS_LOCAL_NAME, false)
-                .join().get();
+        CompletableFuture<Optional<Topic>> future = pulsar1.getBrokerService()
+                .getTopic(namespace + "/" + SystemTopicNames.NAMESPACE_EVENTS_LOCAL_NAME, false);
+        if (future == null) {
+            return;
+        }
+        Optional<Topic> optional = future.join();
+        if (!optional.isPresent()) {
+            return;
+        }
+        PersistentTopic topic = (PersistentTopic) optional.get();
         Awaitility.await().atMost(Duration.ofSeconds(180)).untilAsserted(() -> {
             TopicStatsImpl topicStats = topic.getStats(true, false, false);
             topicStats.getSubscriptions().entrySet().forEach(entry -> {
diff --git a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorUsingGlobalZKTest.java b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorUsingGlobalZKTest.java
index d827235..b4747a8 100644
--- a/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorUsingGlobalZKTest.java
+++ b/pulsar-broker/src/test/java/org/apache/pulsar/broker/service/OneWayReplicatorUsingGlobalZKTest.java
@@ -94,4 +94,14 @@
     public void testDeletePartitionedTopic() throws Exception {
         super.testDeletePartitionedTopic();
     }
+
+    @Test(enabled = false)
+    public void testNoExpandTopicPartitionsWhenDisableTopicLevelReplication() throws Exception {
+        super.testNoExpandTopicPartitionsWhenDisableTopicLevelReplication();
+    }
+
+    @Test(enabled = false)
+    public void testExpandTopicPartitionsOnNamespaceLevelReplication() throws Exception {
+        super.testExpandTopicPartitionsOnNamespaceLevelReplication();
+    }
 }