diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index db4b3edc..d9f4cd92 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -5,7 +5,6 @@ A high level overview of tools used:
 
 - TypeScript as the development language
 - Webpack for bundling
-- Egg.js for api proxy
 - Prettier and styleLint for code formating
 
 Commit information must contain one item in list below:
diff --git a/README.md b/README.md
index f803eee3..299f6207 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # Nebula Graph Studio
-Nebula Graph Studio (Studio for short) is a web-based visualization tool for Nebula Graph. With Studio, you can create a graph schema, import data, edit nGQL statements for data queries, and explore graphs.
+Nebula Graph Studio (Studio for short) is a web-based visualization tool for Nebula Graph. With Studio, you can create a graph schema, import data and edit nGQL statements for data queries.
 ![](./introduction.png)
 
 ## Architecture
@@ -53,8 +53,8 @@ kill -9 $(lsof -t -i :7001)
 ```
 
 ## Documentation 
-[中文](https://docs.nebula-graph.com.cn/2.5.0/nebula-studio/about-studio/st-ug-what-is-graph-studio/)
-[ENGLISH](https://https://docs.nebula-graph.io/2.5.0/nebula-studio/about-studio/st-ug-what-is-graph-studio/)
+[中文](https://docs.nebula-graph.com.cn/3.1.0/nebula-studio/about-studio/st-ug-what-is-graph-studio/)
+[ENGLISH](https://https://docs.nebula-graph.io/3.1.0/nebula-studio/about-studio/st-ug-what-is-graph-studio/)
 
 ## Contributing
-Contributions are warmly welcomed and greatly appreciated. Please see [Guide Docs](https://github.com/vesoft-inc-private/nebula-graph-studio/blob/master/CONTRIBUTING.md) 
\ No newline at end of file
+Contributions are warmly welcomed and greatly appreciated. Please see [Guide Docs](https://github.com/vesoft-inc/nebula-studio/blob/master/CONTRIBUTING.md) 
\ No newline at end of file
diff --git a/introduction.png b/introduction.png
index 930cd649..cc0f167c 100644
Binary files a/introduction.png and b/introduction.png differ
diff --git a/server/go.mod b/server/go.mod
index 6bd59cbd..8892d545 100644
--- a/server/go.mod
+++ b/server/go.mod
@@ -8,7 +8,7 @@ require (
 	github.com/kataras/iris/v12 v12.2.0-alpha4
 	github.com/mattn/go-sqlite3 v2.0.3+incompatible
 	github.com/saintfish/chardet v0.0.0-20120816061221-3af4cd4741ca
-	github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220413113447-a3f4c56287d8
+	github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220505125038-4cab57802c58
 	github.com/vesoft-inc/nebula-importer v1.0.1-0.20220426040009-20ff1284d0e5
 	go.uber.org/zap v1.17.0
 	gopkg.in/yaml.v2 v2.4.0
diff --git a/server/go.sum b/server/go.sum
index b2391d19..a475b79d 100644
--- a/server/go.sum
+++ b/server/go.sum
@@ -255,6 +255,8 @@ github.com/vesoft-inc/nebula-go/v3 v3.1.0 h1:Fp99YPk3/kNY1HERagDfty3To+hdi97dCO7
 github.com/vesoft-inc/nebula-go/v3 v3.1.0/go.mod h1:+sXv05jYQBARdTbTcIEsWVXCnF/6ttOlDK35xQ6m54s=
 github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220413113447-a3f4c56287d8 h1:iL92Uk6hAe4vUBK/L99wf5295HYOtnD4plctVA5xek0=
 github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220413113447-a3f4c56287d8/go.mod h1:sFEvE+cY4TgwqWx6H6msOqAUzRhsEHHKaaMgIZENHuQ=
+github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220505125038-4cab57802c58 h1:ll05614kpzUb8CRpY6nVWqDPgRVoJBbxnryXRSR6CtM=
+github.com/vesoft-inc/nebula-http-gateway/ccore v0.0.0-20220505125038-4cab57802c58/go.mod h1:sFEvE+cY4TgwqWx6H6msOqAUzRhsEHHKaaMgIZENHuQ=
 github.com/vesoft-inc/nebula-importer v1.0.1-0.20220426040009-20ff1284d0e5 h1:JUsR+0PmyQnqfdBcxooOdSKOOf1HESHLfhee+gMOaTM=
 github.com/vesoft-inc/nebula-importer v1.0.1-0.20220426040009-20ff1284d0e5/go.mod h1:m2L91hHgSGbfRB05J//Z8qqnEcYB6PsWbY1OX5f/uJY=
 github.com/vmihailenco/msgpack/v5 v5.0.0/go.mod h1:HVxBVPUK/+fZMonk4bi1islLa8V3cfnBug0+4dykPzo=