diff --git a/docs/en/setup/backend/backend-mysql-monitoring.md b/docs/en/setup/backend/backend-mysql-monitoring.md
index 9cd1724794..b112a19fd9 100644
--- a/docs/en/setup/backend/backend-mysql-monitoring.md
+++ b/docs/en/setup/backend/backend-mysql-monitoring.md
@@ -33,7 +33,7 @@ Each MySQL/MariaDB server is cataloged as an `Instance` in OAP.
 
 ### Customizations
 You can customize your own metrics/expression/dashboard panel.
-The metrics definition and expression rules are found in `/config/otel-rules/mysql.yaml`.
+The metrics definition and expression rules are found in `/config/otel-rules/mysql`.
 The MySQL dashboard panel configurations are found in `/config/ui-initialized-templates/mysql`.
 
 ## Collect sampled slow SQLs
diff --git a/docs/en/setup/backend/backend-postgresql-monitoring.md b/docs/en/setup/backend/backend-postgresql-monitoring.md
index 6f75e48828..32e93cb947 100644
--- a/docs/en/setup/backend/backend-postgresql-monitoring.md
+++ b/docs/en/setup/backend/backend-postgresql-monitoring.md
@@ -47,7 +47,7 @@ PostgreSQL monitoring provides monitoring of the status and resources of the Pos
 
 ### Customizations
 You can customize your own metrics/expression/dashboard panel.
-The metrics definition and expression rules are found in `/config/otel-rules/postgresql.yaml`.
+The metrics definition and expression rules are found in `/config/otel-rules/postgresql`.
 The PostgreSQL dashboard panel configurations are found in `/config/ui-initialized-templates/postgresql`.
 
 ## Collect sampled slow SQLs
diff --git a/docs/en/setup/backend/opentelemetry-receiver.md b/docs/en/setup/backend/opentelemetry-receiver.md
index 63a773db8b..fced5fbb6d 100644
--- a/docs/en/setup/backend/opentelemetry-receiver.md
+++ b/docs/en/setup/backend/opentelemetry-receiver.md
@@ -29,19 +29,21 @@ and its value is from `Node.identifier.host_name` defined in OpenCensus Agent Pr
 or `net.host.name` (or `host.name` for some OTLP versions) resource attributes defined in OpenTelemetry proto,
 for identification of the metric data.
 
-| Description                             | Configuration File                  | Data Source                                                                                                       |
-|-----------------------------------------|-------------------------------------|-------------------------------------------------------------------------------------------------------------------|
-| Metrics of Istio Control Plane          | otel-rules/istio-controlplane.yaml  | Istio Control Plane -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                      |
-| Metrics of SkyWalking OAP server itself | otel-rules/oap.yaml                 | SkyWalking OAP Server(SelfObservability) -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server |
-| Metrics of VMs                          | otel-rules/vm.yaml                  | Prometheus node-exporter(VMs) -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server            |
-| Metrics of K8s cluster                  | otel-rules/k8s/k8s-cluster.yaml     | K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                   |
-| Metrics of K8s cluster                  | otel-rules/k8s/k8s-node.yaml        | cAdvisor & K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server        |
-| Metrics of K8s cluster                  | otel-rules/k8s/k8s-service.yaml     | cAdvisor & K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server        |
-| Metrics of MYSQL                        | otel-rules/mysql.yaml               | prometheus/mysqld_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server               |
-| Metrics of PostgreSQL                   | otel-rules/postgresql.yaml          | postgres_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                        |
-| Metrics of Apache APISIX                | otel-rules/apisix.yaml              | apisix prometheus plugin -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                 |
-| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-cluster.yaml | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
-| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-service.yaml | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
-| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-node.yaml    | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
+| Description                             | Configuration File                             | Data Source                                                                                                       |
+|-----------------------------------------|------------------------------------------------|-------------------------------------------------------------------------------------------------------------------|
+| Metrics of Istio Control Plane          | otel-rules/istio-controlplane.yaml             | Istio Control Plane -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                      |
+| Metrics of SkyWalking OAP server itself | otel-rules/oap.yaml                            | SkyWalking OAP Server(SelfObservability) -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server |
+| Metrics of VMs                          | otel-rules/vm.yaml                             | Prometheus node-exporter(VMs) -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server            |
+| Metrics of K8s cluster                  | otel-rules/k8s/k8s-cluster.yaml                | K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                   |
+| Metrics of K8s cluster                  | otel-rules/k8s/k8s-node.yaml                   | cAdvisor & K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server        |
+| Metrics of K8s cluster                  | otel-rules/k8s/k8s-service.yaml                | cAdvisor & K8s kube-state-metrics -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server        |
+| Metrics of MYSQL                        | otel-rules/mysql/mysql-instance.yaml           | prometheus/mysqld_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server               |
+| Metrics of MYSQL                        | otel-rules/mysql/mysql-service.yaml            | prometheus/mysqld_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server               |
+| Metrics of PostgreSQL                   | otel-rules/postgresql/postgresql-instance.yaml | postgres_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                        |
+| Metrics of PostgreSQL                   | otel-rules/postgresql/postgresql-service.yaml  | postgres_exporter -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                        |
+| Metrics of Apache APISIX                | otel-rules/apisix.yaml                         | apisix prometheus plugin -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server                 |
+| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-cluster.yaml            | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
+| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-service.yaml            | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
+| Metrics of AWS Cloud EKS                | otel-rules/aws-eks/eks-node.yaml               | AWS Container Insights Receiver -> OpenTelemetry Collector -- OC/OTLP exporter --> SkyWalking OAP Server          |
 
 **Note**: You can also use OpenTelemetry exporter to transport the metrics to SkyWalking OAP directly. See [OpenTelemetry Exporter](./backend-meter.md#opentelemetry-exporter).