diff --git a/backend/src/service/user_service/logged_user.rs b/backend/src/service/user_service/logged_user.rs
index 40c06f3141..443574ad70 100644
--- a/backend/src/service/user_service/logged_user.rs
+++ b/backend/src/service/user_service/logged_user.rs
@@ -77,7 +77,7 @@ enum AuthStatus {
     NotAuthorized,
 }
 
-pub const EXPIRED_DURATION_DAYS: i64 = 5;
+pub const EXPIRED_DURATION_DAYS: i64 = 30;
 
 pub struct AuthorizedUsers(DashMap<LoggedUser, AuthStatus>);
 impl AuthorizedUsers {
diff --git a/rust-lib/flowy-document/src/module.rs b/rust-lib/flowy-document/src/module.rs
index e9b4f52702..70fa5e6888 100644
--- a/rust-lib/flowy-document/src/module.rs
+++ b/rust-lib/flowy-document/src/module.rs
@@ -3,6 +3,7 @@ use crate::{
     errors::{internal_error, DocError},
     services::{doc_controller::DocController, open_doc::OpenedDocManager, server::construct_doc_server, ws::WsManager},
 };
+use bytes::Bytes;
 use diesel::SqliteConnection;
 use flowy_database::ConnectionPool;
 use parking_lot::RwLock;
@@ -56,7 +57,7 @@ impl FlowyDocument {
     }
 
     pub async fn apply_changeset(&self, params: ApplyChangesetParams, pool: Arc<ConnectionPool>) -> Result<Doc, DocError> {
-        let _ = self.doc_manager.apply_changeset(&params.id, params.data, pool).await?;
+        let _ = self.doc_manager.apply_changeset(&params.id, Bytes::from(params.data), pool).await?;
         let data = self.doc_manager.read_doc(&params.id).await?;
         let doc = Doc { id: params.id, data };
         Ok(doc)
diff --git a/rust-lib/flowy-document/src/services/doc_controller.rs b/rust-lib/flowy-document/src/services/doc_controller.rs
index 5af4e44229..42a6f186b7 100644
--- a/rust-lib/flowy-document/src/services/doc_controller.rs
+++ b/rust-lib/flowy-document/src/services/doc_controller.rs
@@ -135,8 +135,6 @@ impl OpenedDocPersistence for DocController {
     fn save(&self, params: SaveDocParams, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
         let changeset = DocTableChangeset::new(params.clone());
         let _ = self.sql.update_doc_table(changeset, &*(pool.get().map_err(internal_error)?))?;
-        let _ = self.update_doc_on_server(params)?;
-
         Ok(())
     }
 }
diff --git a/rust-lib/flowy-document/src/services/open_doc/manager.rs b/rust-lib/flowy-document/src/services/open_doc/manager.rs
index 73e501d87b..43e0b4ae4f 100644
--- a/rust-lib/flowy-document/src/services/open_doc/manager.rs
+++ b/rust-lib/flowy-document/src/services/open_doc/manager.rs
@@ -5,6 +5,7 @@ use crate::{
         ws::WsManager,
     },
 };
+use bytes::Bytes;
 use dashmap::DashMap;
 use flowy_database::ConnectionPool;
 use flowy_ot::{core::Delta, errors::OTError};
@@ -32,7 +33,12 @@ impl OpenedDocManager {
         T: Into<DocId> + Debug,
         D: TryInto<Delta, Error = OTError>,
     {
-        let doc = Arc::new(OpenedDoc::new(id.into(), data.try_into()?, self.persistence.clone()));
+        let doc = Arc::new(OpenedDoc::new(
+            id.into(),
+            data.try_into()?,
+            self.persistence.clone(),
+            self.ws_manager.read().sender.clone(),
+        ));
         self.ws_manager.write().register_handler(doc.id.as_ref(), doc.clone());
         self.doc_map.insert(doc.id.clone(), doc.clone());
         Ok(())
@@ -47,7 +53,7 @@ impl OpenedDocManager {
     }
 
     #[tracing::instrument(level = "debug", skip(self, changeset, pool), err)]
-    pub(crate) async fn apply_changeset<T>(&self, id: T, changeset: Vec<u8>, pool: Arc<ConnectionPool>) -> Result<(), DocError>
+    pub(crate) async fn apply_changeset<T>(&self, id: T, changeset: Bytes, pool: Arc<ConnectionPool>) -> Result<(), DocError>
     where
         T: Into<DocId> + Debug,
     {
diff --git a/rust-lib/flowy-document/src/services/open_doc/open_doc.rs b/rust-lib/flowy-document/src/services/open_doc/open_doc.rs
index 07d0e5a270..7545fac355 100644
--- a/rust-lib/flowy-document/src/services/open_doc/open_doc.rs
+++ b/rust-lib/flowy-document/src/services/open_doc/open_doc.rs
@@ -4,8 +4,9 @@ use crate::{
         ws::{WsDocumentData, WsSource},
     },
     errors::DocError,
-    services::ws::WsHandler,
+    services::ws::{WsHandler, WsSender},
 };
+use bytes::Bytes;
 use flowy_database::ConnectionPool;
 use flowy_ot::{client::Document, core::Delta};
 use parking_lot::RwLock;
@@ -30,23 +31,28 @@ pub(crate) trait OpenedDocPersistence: Send + Sync {
 pub(crate) struct OpenedDoc {
     pub(crate) id: DocId,
     document: RwLock<Document>,
+    ws_sender: Arc<dyn WsSender>,
     persistence: Arc<dyn OpenedDocPersistence>,
 }
 
 impl OpenedDoc {
-    pub(crate) fn new(id: DocId, delta: Delta, persistence: Arc<dyn OpenedDocPersistence>) -> Self {
+    pub(crate) fn new(id: DocId, delta: Delta, persistence: Arc<dyn OpenedDocPersistence>, ws_sender: Arc<dyn WsSender>) -> Self {
+        let document = RwLock::new(Document::from_delta(delta));
         Self {
             id,
-            document: RwLock::new(Document::from_delta(delta)),
+            document,
+            ws_sender,
             persistence,
         }
     }
 
     pub(crate) fn data(&self) -> Vec<u8> { self.document.read().to_bytes() }
 
-    pub(crate) fn apply_delta(&self, data: Vec<u8>, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
+    pub(crate) fn apply_delta(&self, data: Bytes, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
         let mut write_guard = self.document.write();
-        let _ = write_guard.apply_changeset(data)?;
+        let _ = write_guard.apply_changeset(data.clone())?;
+
+        self.ws_sender.send_data(data);
 
         // Opti: strategy to save the document
         let mut save = SaveDocParams {
diff --git a/rust-lib/flowy-document/src/services/ws/ws_manager.rs b/rust-lib/flowy-document/src/services/ws/ws_manager.rs
index d42c8c6368..1af17bb1fe 100644
--- a/rust-lib/flowy-document/src/services/ws/ws_manager.rs
+++ b/rust-lib/flowy-document/src/services/ws/ws_manager.rs
@@ -12,12 +12,12 @@ lazy_static! {
 }
 
 pub struct WsManager {
-    sender: Box<dyn WsSender>,
+    pub(crate) sender: Arc<dyn WsSender>,
     doc_handlers: HashMap<String, Arc<dyn WsHandler>>,
 }
 
 impl WsManager {
-    pub fn new(sender: Box<dyn WsSender>) -> Self {
+    pub fn new(sender: Arc<dyn WsSender>) -> Self {
         Self {
             sender,
             doc_handlers: HashMap::new(),
@@ -45,9 +45,9 @@ impl WsManager {
             },
         }
     }
+
     pub fn send_data(&self, data: WsDocumentData) {
         let bytes: Bytes = data.try_into().unwrap();
-
         match self.sender.send_data(bytes) {
             Ok(_) => {},
             Err(e) => {
diff --git a/rust-lib/flowy-ot/Cargo.toml b/rust-lib/flowy-ot/Cargo.toml
index 019919c9b2..d511bb9385 100644
--- a/rust-lib/flowy-ot/Cargo.toml
+++ b/rust-lib/flowy-ot/Cargo.toml
@@ -17,6 +17,7 @@ lazy_static = "1.4.0"
 url = "2.2"
 strum = "0.21"
 strum_macros = "0.21"
+bytes = "1.0"
 
 
 [dev-dependencies]
diff --git a/rust-lib/flowy-ot/src/core/delta/delta.rs b/rust-lib/flowy-ot/src/core/delta/delta.rs
index c31f30150f..dd35fa18c8 100644
--- a/rust-lib/flowy-ot/src/core/delta/delta.rs
+++ b/rust-lib/flowy-ot/src/core/delta/delta.rs
@@ -3,6 +3,8 @@ use crate::{
     errors::{ErrorBuilder, OTError, OTErrorCode},
 };
 use bytecount::num_chars;
+use bytes::Bytes;
+use serde::__private::TryFrom;
 use std::{
     cmp::{min, Ordering},
     fmt,
@@ -44,6 +46,15 @@ impl std::convert::TryFrom<Vec<u8>> for Delta {
     fn try_from(bytes: Vec<u8>) -> Result<Self, Self::Error> { Delta::from_bytes(bytes) }
 }
 
+impl std::convert::TryFrom<Bytes> for Delta {
+    type Error = OTError;
+
+    fn try_from(value: Bytes) -> Result<Self, Self::Error> {
+        let bytes = value.to_vec();
+        Delta::from_bytes(bytes)
+    }
+}
+
 // impl<T: AsRef<Vec<u8>>> std::convert::From<T> for Delta {
 //     fn from(bytes: T) -> Self {
 // Delta::from_bytes(bytes.as_ref().to_vec()).unwrap() } }
diff --git a/rust-lib/flowy-sdk/src/deps_resolve/document_deps.rs b/rust-lib/flowy-sdk/src/deps_resolve/document_deps.rs
index 62a856dc7c..249aea34f0 100644
--- a/rust-lib/flowy-sdk/src/deps_resolve/document_deps.rs
+++ b/rust-lib/flowy-sdk/src/deps_resolve/document_deps.rs
@@ -22,7 +22,7 @@ impl DocumentDepsResolver {
             user: self.user_session.clone(),
         });
 
-        let sender = Box::new(WsSenderImpl {
+        let sender = Arc::new(WsSenderImpl {
             user: self.user_session.clone(),
         });