diff --git a/core/fx/fn.go b/core/fx/stream.go
similarity index 100%
rename from core/fx/fn.go
rename to core/fx/stream.go
diff --git a/core/fx/fn_test.go b/core/fx/stream_test.go
similarity index 100%
rename from core/fx/fn_test.go
rename to core/fx/stream_test.go
diff --git a/rest/server.go b/rest/server.go
index 10a32fd1..2c3ec2cb 100644
--- a/rest/server.go
+++ b/rest/server.go
@@ -77,6 +77,8 @@ func (e *Server) AddRoute(r Route, opts ...RouteOption) {
 }
 
 // Start starts the Server.
+// Graceful shutdown is enabled by default.
+// Use proc.SetTimeToForceQuit to customize the graceful shutdown period.
 func (e *Server) Start() {
 	handleError(e.opts.start(e.ngin))
 }
diff --git a/zrpc/server.go b/zrpc/server.go
index 9b367667..0f5fe8a5 100644
--- a/zrpc/server.go
+++ b/zrpc/server.go
@@ -79,6 +79,8 @@ func (rs *RpcServer) AddUnaryInterceptors(interceptors ...grpc.UnaryServerInterc
 }
 
 // Start starts the RpcServer.
+// Graceful shutdown is enabled by default.
+// Use proc.SetTimeToForceQuit to customize the graceful shutdown period.
 func (rs *RpcServer) Start() {
 	if err := rs.server.Start(rs.register); err != nil {
 		logx.Error(err)