diff --git a/docs/en/setup/backend/backend-receivers.md b/docs/en/setup/backend/backend-receivers.md
index 2dbc5891d..2f8dbbd66 100644
--- a/docs/en/setup/backend/backend-receivers.md
+++ b/docs/en/setup/backend/backend-receivers.md
@@ -4,7 +4,7 @@ or tracing data from other being monitored system, are all being called **Receiv
 receivers are using gRPC or HTTPRestful to provide service, actually, whether listening mode or pull mode
 could be receiver. Such as a receiver could base on pull data from remote, like Kakfa MQ.
 
-We have following receivers, and `default` implementors are provided in our Apache distribution.zzz
+We have following receivers, and `default` implementors are provided in our Apache distribution.
 1. **receiver-trace**. gRPC and HTTPRestful services to accept SkyWalking format traces.
 1. **receiver-register**. gRPC and HTTPRestful services to provide service, service instance and endpoint register.
 1. **service-mesh**. gRPC services accept data from inbound mesh probes.