ticdc: fix overview and 6.5 release notes (#12677) (#12684)

releases/release-6.5.0.md

@@ -272,7 +272,9 @@ Compared with the previous LTS 6.1.0, 6.5.0 not only includes new features, impr
 
 * TiCDC performance improves significantly [#7540](https://github.com/pingcap/tiflow/issues/7540) [#7478](https://github.com/pingcap/tiflow/issues/7478) [#7532](https://github.com/pingcap/tiflow/issues/7532) @[sdojjy](https://github.com/sdojjy) [@3AceShowHand](https://github.com/3AceShowHand)
 
-    In a test scenario of the TiDB cluster, the performance of TiCDC has improved significantly. Specifically, the maximum row changes that a single TiCDC can process reaches 30K rows/s, and the replication latency is reduced to 10s. Even during TiKV and TiCDC rolling upgrade, the replication latency is less than 30s. In a disaster recovery (DR) scenario, by enabling TiCDC redo logs and Syncpoint, the TiCDC throughput of [replicating data to Kafka](/replicate-data-to-kafka.md) can be improved from 4000 rows/s to 35000 rows/s, and the replication latency can be maintained at 2s.
+    In a test scenario of the TiDB cluster, the performance of TiCDC has improved significantly. Specifically, in the scenario of replicating data to Kafka, the maximum row changes that a single TiCDC can process reaches 30K rows/s, and the replication latency is reduced to 10s. Even during TiKV and TiCDC rolling upgrade, the replication latency is less than 30s.
+
+    In a disaster recovery (DR) scenario, if TiCDC redo log and Syncpoint are enabled, the TiCDC throughput of [replicating data to Kafka](/replicate-data-to-kafka.md) can be improved from 4000 rows/s to 35000 rows/s, and the replication latency can be limited to 2s.
 
 ### Backup and restore
 

ticdc/ticdc-overview.md

@@ -17,6 +17,7 @@ summary: Learn what TiCDC is, what features TiCDC provides, and how to install a
 ### Key capabilities
 
 - Replicate incremental data from one TiDB cluster to another TiDB cluster with second-level RPO and minute-level RTO.
+- Replicate data bidirectionally between TiDB clusters, based on which you can create a multi-active TiDB solution using TiCDC.
 - Replicate incremental data from a TiDB cluster to a MySQL database (or other MySQL-compatible databases) with low latency.
 - Replicate incremental data from a TiDB cluster to a Kafka cluster. The recommended data format includes [Canal-JSON](/ticdc/ticdc-canal-json.md) and [Avro](/ticdc/ticdc-avro-protocol.md).
 - Replicate tables with the ability to filter databases, tables, DMLs, and DDLs.
@@ -89,7 +90,3 @@ Currently, the following scenarios are not supported:
 - The [DDL operation `CREATE SEQUENCE`](/sql-statements/sql-statement-create-sequence.md) and the [SEQUENCE function](/sql-statements/sql-statement-create-sequence.md#sequence-function) in TiDB. When the upstream TiDB uses `SEQUENCE`, TiCDC ignores `SEQUENCE` DDL operations/functions performed upstream. However, DML operations using `SEQUENCE` functions can be correctly replicated.
 
 TiCDC only provides partial support for scenarios of large transactions in the upstream. For details, refer to [Does TiCDC support replicating large transactions? Is there any risk?](/ticdc/ticdc-faq.md#does-ticdc-support-replicating-large-transactions-is-there-any-risk).
-
-> **Note:**
->
-> Since v5.3.0, TiCDC no longer supports the cyclic replication feature.