diff --git a/backend/src/application.rs b/backend/src/application.rs
index 5a5a3e466d..00c5b52deb 100644
--- a/backend/src/application.rs
+++ b/backend/src/application.rs
@@ -110,7 +110,7 @@ fn user_scope() -> Scope {
             .route(web::get().to(view::read_handler))
             .route(web::patch().to(view::update_handler))
         )
-        .service(web::resource("/document")
+        .service(web::resource("/doc")
             .route(web::post().to(doc::create_document_handler))
             .route(web::get().to(doc::read_document_handler))
             .route(web::patch().to(doc::reset_document_handler))
diff --git a/backend/src/context.rs b/backend/src/context.rs
index 6f044e3903..b6f5f5a3ec 100644
--- a/backend/src/context.rs
+++ b/backend/src/context.rs
@@ -1,5 +1,5 @@
 use crate::services::{
-    kv::{KVStore, PostgresKV},
+    kv::PostgresKV,
     web_socket::{WSServer, WebSocketReceivers},
 };
 use actix::Addr;
diff --git a/backend/src/services/document/persistence/kv_store.rs b/backend/src/services/document/persistence/kv_store.rs
index 4c91ef23a6..24b6722f4f 100644
--- a/backend/src/services/document/persistence/kv_store.rs
+++ b/backend/src/services/document/persistence/kv_store.rs
@@ -1,8 +1,10 @@
-use crate::{services::kv::KVStore, util::serde_ext::parse_from_bytes};
+use crate::{
+    services::kv::{KVStore, KeyValue},
+    util::serde_ext::parse_from_bytes,
+};
 use backend_service::errors::ServerError;
 use bytes::Bytes;
 use flowy_collaboration::protobuf::{RepeatedRevision, Revision};
-use futures::stream::{self, StreamExt};
 use protobuf::Message;
 use std::sync::Arc;
 
@@ -25,16 +27,25 @@ impl DocumentKVPersistence {
 
     pub(crate) async fn batch_set_revision(&self, revisions: Vec<Revision>) -> Result<(), ServerError> {
         let kv_store = self.inner.clone();
-
-        let f = |revision: Revision, kv_store: Arc<dyn KVStore>| async move {
-            let key = make_revision_key(&revision.doc_id, revision.rev_id);
-            let bytes = revision.write_to_bytes().unwrap();
-            let _ = kv_store.set(&key, Bytes::from(bytes)).await;
-        };
-
-        stream::iter(revisions)
-            .for_each_concurrent(None, |revision| f(revision, kv_store.clone()))
-            .await;
+        let items = revisions
+            .into_iter()
+            .map(|revision| {
+                let key = make_revision_key(&revision.doc_id, revision.rev_id);
+                let value = Bytes::from(revision.write_to_bytes().unwrap());
+                KeyValue { key, value }
+            })
+            .collect::<Vec<KeyValue>>();
+        let _ = kv_store.batch_set(items).await?;
+        // use futures::stream::{self, StreamExt};
+        // let f = |revision: Revision, kv_store: Arc<dyn KVStore>| async move {
+        //     let key = make_revision_key(&revision.doc_id, revision.rev_id);
+        //     let bytes = revision.write_to_bytes().unwrap();
+        //     let _ = kv_store.set(&key, Bytes::from(bytes)).await.unwrap();
+        // };
+        //
+        // stream::iter(revisions)
+        //     .for_each_concurrent(None, |revision| f(revision, kv_store.clone()))
+        //     .await;
         Ok(())
     }
 
@@ -55,11 +66,14 @@ impl DocumentKVPersistence {
             },
         };
 
-        let revisions = items
+        let mut revisions = items
             .into_iter()
             .filter_map(|kv| parse_from_bytes::<Revision>(&kv.value).ok())
             .collect::<Vec<Revision>>();
 
+        // TODO: optimize sort
+        revisions.sort_by(|a, b| a.rev_id.cmp(&b.rev_id));
+
         let mut repeated_revision = RepeatedRevision::new();
         repeated_revision.set_items(revisions.into());
         Ok(repeated_revision)
diff --git a/backend/src/services/document/persistence/postgres.rs b/backend/src/services/document/persistence/postgres.rs
index 2f0d6d1a68..57f941fb00 100644
--- a/backend/src/services/document/persistence/postgres.rs
+++ b/backend/src/services/document/persistence/postgres.rs
@@ -1,4 +1,5 @@
 use crate::{context::FlowyPersistence, services::document::persistence::DocumentKVPersistence};
+use anyhow::Context;
 use backend_service::errors::{internal_error, ServerError};
 use flowy_collaboration::protobuf::{
     CreateDocParams,
@@ -27,7 +28,7 @@ pub(crate) async fn read_doc(
     persistence: &Arc<FlowyPersistence>,
     params: DocIdentifier,
 ) -> Result<DocumentInfo, ServerError> {
-    let _ = Uuid::parse_str(&params.doc_id)?;
+    let _ = Uuid::parse_str(&params.doc_id).context("Parse document id to uuid failed")?;
 
     let kv_store = persistence.kv_store();
     let revisions = kv_store.batch_get_revisions(&params.doc_id, None).await?;
@@ -53,6 +54,10 @@ struct DocTable {
 
 fn make_doc_from_revisions(doc_id: &str, mut revisions: RepeatedRevision) -> Result<DocumentInfo, ServerError> {
     let revisions = revisions.take_items();
+    if revisions.is_empty() {
+        return Err(ServerError::record_not_found().context(format!("{} not exist", doc_id)));
+    }
+
     let mut document_delta = RichTextDelta::new();
     let mut base_rev_id = 0;
     let mut rev_id = 0;
diff --git a/backend/src/services/kv/kv.rs b/backend/src/services/kv/kv.rs
index a1995dffcf..7fca6d9fbd 100644
--- a/backend/src/services/kv/kv.rs
+++ b/backend/src/services/kv/kv.rs
@@ -7,9 +7,10 @@ use anyhow::Context;
 use backend_service::errors::ServerError;
 use bytes::Bytes;
 use lib_infra::future::FutureResultSend;
-use sql_builder::{quote, SqlBuilder as RawSqlBuilder};
+use sql_builder::SqlBuilder as RawSqlBuilder;
 use sqlx::{
     postgres::{PgArguments, PgRow},
+    Arguments,
     Error,
     PgPool,
     Postgres,
@@ -98,20 +99,23 @@ impl KVStore for PostgresKV {
                 .await
                 .context("[KV]:Failed to acquire a Postgres connection")?;
 
+            SqlBuilder::create(KV_TABLE).add_field("id").add_field("blob");
             let mut builder = RawSqlBuilder::insert_into(KV_TABLE);
-            let mut m_builder = builder.field("id").field("blob");
+            let m_builder = builder.field("id").field("blob");
+
+            let mut args = PgArguments::default();
+            kvs.iter().enumerate().for_each(|(index, _)| {
+                let index = index * 2 + 1;
+                m_builder.values(&[format!("${}", index), format!("${}", index + 1)]);
+            });
+
             for kv in kvs {
-                let s = match std::str::from_utf8(&kv.value) {
-                    Ok(v) => v,
-                    Err(e) => {
-                        log::error!("[KV]: {}", e);
-                        ""
-                    },
-                };
-                m_builder = m_builder.values(&[quote(kv.key), quote(s)]);
+                args.add(kv.key);
+                args.add(kv.value.to_vec());
             }
+
             let sql = m_builder.sql()?;
-            let _ = sqlx::query(&sql)
+            let _ = sqlx::query_with(&sql, args)
                 .execute(&mut transaction)
                 .await
                 .map_err(map_sqlx_error)?;
diff --git a/backend/src/services/kv/mod.rs b/backend/src/services/kv/mod.rs
index d3a010e4ad..ee2220a080 100644
--- a/backend/src/services/kv/mod.rs
+++ b/backend/src/services/kv/mod.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::module_inception)]
 mod kv;
 
 use bytes::Bytes;
diff --git a/backend/tests/api_test/workspace_test.rs b/backend/tests/api_test/workspace_test.rs
index 7851b9fc52..270db2d401 100644
--- a/backend/tests/api_test/workspace_test.rs
+++ b/backend/tests/api_test/workspace_test.rs
@@ -1,9 +1,17 @@
 #![allow(clippy::all)]
-use crate::util::helper::*;
+
+use crate::util::helper::{ViewTest, *};
+use flowy_collaboration::{
+    core::document::{Document, PlainDoc},
+    entities::{
+        doc::{CreateDocParams, DocIdentifier},
+        revision::{md5, RepeatedRevision, RevType, Revision},
+    },
+};
 use flowy_core_data_model::entities::{
     app::{AppIdentifier, UpdateAppParams},
     trash::{TrashIdentifier, TrashIdentifiers, TrashType},
-    view::{UpdateViewParams, ViewIdentifier},
+    view::{UpdateViewParams, ViewIdentifier, ViewIdentifiers},
     workspace::{CreateWorkspaceParams, UpdateWorkspaceParams, WorkspaceIdentifier},
 };
 
@@ -215,3 +223,60 @@ async fn workspace_list_read() {
     let workspaces = server.read_workspaces(read_params).await;
     assert_eq!(workspaces.len(), 3);
 }
+
+#[actix_rt::test]
+async fn doc_read() {
+    let test = ViewTest::new().await;
+    let params = DocIdentifier {
+        doc_id: test.view.id.clone(),
+    };
+    let doc = test.server.read_doc(params).await;
+    assert_eq!(doc.is_some(), true);
+}
+
+#[actix_rt::test]
+async fn doc_create() {
+    let mut revisions: Vec<Revision> = vec![];
+    let server = TestUserServer::new().await;
+    let doc_id = uuid::Uuid::new_v4().to_string();
+    let user_id = "a".to_owned();
+    let mut document = Document::new::<PlainDoc>();
+    let mut offset = 0;
+    for i in 0..1000 {
+        let content = i.to_string();
+        let delta = document.insert(offset, content.clone()).unwrap();
+        offset += content.len();
+        let bytes = delta.to_bytes();
+        let md5 = md5(&bytes);
+        let revision = if i == 0 {
+            Revision::new(&doc_id, i, i, bytes, RevType::Remote, &user_id, md5)
+        } else {
+            Revision::new(&doc_id, i - 1, i, bytes, RevType::Remote, &user_id, md5)
+        };
+        revisions.push(revision);
+    }
+
+    let params = CreateDocParams {
+        id: doc_id.clone(),
+        revisions: RepeatedRevision { items: revisions },
+    };
+    server.create_doc(params).await;
+
+    let doc = server.read_doc(DocIdentifier { doc_id }).await;
+    assert_eq!(doc.unwrap().text, document.to_json());
+}
+
+#[actix_rt::test]
+async fn doc_delete() {
+    let test = ViewTest::new().await;
+    let delete_params = ViewIdentifiers {
+        view_ids: vec![test.view.id.clone()],
+    };
+    test.server.delete_view(delete_params).await;
+
+    let params = DocIdentifier {
+        doc_id: test.view.id.clone(),
+    };
+    let doc = test.server.read_doc(params).await;
+    assert_eq!(doc.is_none(), true);
+}
diff --git a/backend/tests/document_test/crud_test.rs b/backend/tests/document_test/crud_test.rs
deleted file mode 100644
index d4e1bb37df..0000000000
--- a/backend/tests/document_test/crud_test.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-use crate::util::helper::ViewTest;
-use flowy_collaboration::entities::doc::DocIdentifier;
-use flowy_core_data_model::entities::view::ViewIdentifiers;
-
-#[actix_rt::test]
-async fn doc_read() {
-    let test = ViewTest::new().await;
-    let params = DocIdentifier {
-        doc_id: test.view.id.clone(),
-    };
-    let doc = test.server.read_doc(params).await;
-    assert_eq!(doc.is_some(), true);
-}
-
-#[actix_rt::test]
-async fn doc_delete() {
-    let test = ViewTest::new().await;
-    let delete_params = ViewIdentifiers {
-        view_ids: vec![test.view.id.clone()],
-    };
-    test.server.delete_view(delete_params).await;
-
-    let params = DocIdentifier {
-        doc_id: test.view.id.clone(),
-    };
-    let doc = test.server.read_doc(params).await;
-    assert_eq!(doc.is_none(), true);
-}
diff --git a/backend/tests/document_test/mod.rs b/backend/tests/document_test/mod.rs
index 3a785e530b..14cb6254f7 100644
--- a/backend/tests/document_test/mod.rs
+++ b/backend/tests/document_test/mod.rs
@@ -1,3 +1,2 @@
 // mod edit_script;
 // mod edit_test;
-mod crud_test;
diff --git a/backend/tests/util/helper.rs b/backend/tests/util/helper.rs
index 8930867a02..fb29f007c4 100644
--- a/backend/tests/util/helper.rs
+++ b/backend/tests/util/helper.rs
@@ -9,9 +9,9 @@ use backend_service::{
     user_request::*,
     workspace_request::*,
 };
-use flowy_collaboration::entities::doc::{DocIdentifier, DocumentInfo};
+use flowy_collaboration::entities::doc::{CreateDocParams, DocIdentifier, DocumentInfo};
 use flowy_core_data_model::entities::prelude::*;
-use flowy_document::services::server::read_doc_request;
+use flowy_document::services::server::{create_doc_request, read_doc_request};
 use flowy_user_data_model::entities::*;
 use sqlx::{Connection, Executor, PgConnection, PgPool};
 use uuid::Uuid;
@@ -155,6 +155,11 @@ impl TestUserServer {
         doc
     }
 
+    pub async fn create_doc(&self, params: CreateDocParams) {
+        let url = format!("{}/api/doc", self.http_addr());
+        let _ = create_doc_request(self.user_token(), params, &url).await.unwrap();
+    }
+
     pub async fn register_user(&self) -> SignUpResponse {
         let params = SignUpParams {
             email: "annie@appflowy.io".to_string(),
diff --git a/frontend/rust-lib/flowy-document/src/services/server/server_api.rs b/frontend/rust-lib/flowy-document/src/services/server/server_api.rs
index 45a6003a49..7536c72b1e 100644
--- a/frontend/rust-lib/flowy-document/src/services/server/server_api.rs
+++ b/frontend/rust-lib/flowy-document/src/services/server/server_api.rs
@@ -27,7 +27,7 @@ impl DocumentServerAPI for DocServer {
     fn update_doc(&self, token: &str, params: ResetDocumentParams) -> FutureResult<(), FlowyError> {
         let token = token.to_owned();
         let url = self.config.doc_url();
-        FutureResult::new(async move { update_doc_request(&token, params, &url).await })
+        FutureResult::new(async move { reset_doc_request(&token, params, &url).await })
     }
 }
 
@@ -60,7 +60,7 @@ pub async fn read_doc_request(
     Ok(doc)
 }
 
-pub async fn update_doc_request(token: &str, params: ResetDocumentParams, url: &str) -> Result<(), FlowyError> {
+pub async fn reset_doc_request(token: &str, params: ResetDocumentParams, url: &str) -> Result<(), FlowyError> {
     let _ = request_builder()
         .patch(&url.to_owned())
         .header(HEADER_TOKEN, token)
diff --git a/shared-lib/flowy-collaboration/src/core/document/document.rs b/shared-lib/flowy-collaboration/src/core/document/document.rs
index 4178488e78..d15f920edf 100644
--- a/shared-lib/flowy-collaboration/src/core/document/document.rs
+++ b/shared-lib/flowy-collaboration/src/core/document/document.rs
@@ -106,7 +106,7 @@ impl Document {
             self.history.record(undo_delta);
         }
 
-        tracing::debug!("compose result: {}", composed_delta.to_json());
+        tracing::trace!("compose result: {}", composed_delta.to_json());
         trim(&mut composed_delta);
 
         self.set_delta(composed_delta);
diff --git a/shared-lib/flowy-collaboration/src/core/sync/synchronizer.rs b/shared-lib/flowy-collaboration/src/core/sync/synchronizer.rs
index f20e265375..6abaae15c0 100644
--- a/shared-lib/flowy-collaboration/src/core/sync/synchronizer.rs
+++ b/shared-lib/flowy-collaboration/src/core/sync/synchronizer.rs
@@ -154,6 +154,7 @@ impl RevisionSynchronizer {
         }
     }
 
+    #[allow(dead_code)]
     fn rev_id(&self) -> i64 { self.rev_id.load(SeqCst) }
 }
 
diff --git a/shared-lib/lib-ot/src/errors.rs b/shared-lib/lib-ot/src/errors.rs
index 2346908169..52597c4e76 100644
--- a/shared-lib/lib-ot/src/errors.rs
+++ b/shared-lib/lib-ot/src/errors.rs
@@ -98,10 +98,3 @@ impl ErrorBuilder {
 
     pub fn build(mut self) -> OTError { OTError::new(self.code, &self.msg.take().unwrap_or_else(|| "".to_owned())) }
 }
-
-pub(crate) fn internal_error<T>(e: T) -> OTError
-where
-    T: std::fmt::Debug,
-{
-    OTError::internal().context(e)
-}