diff --git a/docs/en/concepts-and-designs/service-mesh-probe.md b/docs/en/concepts-and-designs/service-mesh-probe.md
index c474b32ae..ab48fc840 100644
--- a/docs/en/concepts-and-designs/service-mesh-probe.md
+++ b/docs/en/concepts-and-designs/service-mesh-probe.md
@@ -12,7 +12,7 @@ such as A/B testing, canary releases, rate limiting, access control, and end-to-
Istio is a very typical Service Mesh design and implementor. It defines **Control Panel** and **Data Panel**,
which are wide used. Here is Istio Architecture:
-
+
Service Mesh probe can choose to collect data from **Control Panel** or **Data Panel**. In Istio,
it means collecting telemetry data from Mixer(Control Panel) or Envoy sidecar(Data Panel). Underlying