[shardingsphere] branch master updated: Update index of concept (#13116)

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The following commit(s) were added to refs/heads/master by this push:
     new 5efbc4c  Update index of concept (#13116)
5efbc4c is described below

commit 5efbc4c49c84e4b911b0b9ca5ddb40ac0a250fe6
Author: Liang Zhang <te...@163.com>
AuthorDate: Tue Oct 19 06:47:41 2021 +0800

    Update index of concept (#13116)
    
    * Update index of concept
    
    * Update index of concept
---
 docs/document/content/concepts/_index.cn.md | 5 ++++-
 docs/document/content/concepts/_index.en.md | 6 +++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/docs/document/content/concepts/_index.cn.md b/docs/document/content/concepts/_index.cn.md
index a63ebb3..78ea75e 100644
--- a/docs/document/content/concepts/_index.cn.md
+++ b/docs/document/content/concepts/_index.cn.md
@@ -5,4 +5,7 @@ weight = 3
 chapter = true
 +++
 
-本章节阐述 Apache ShardingSphere 相关的概念，更多使用细节请阅读[用户手册](/cn/user-manual/)。
+Apache ShardingSphere 功能十分复杂，有数百模块之多，但众多模块间的概念却简单明了。大部分模块都是面向这几个概念的横向扩展。
+它的概念主要包括：面向独立产品的接入端、面向启动的运行模式、面向使用者操作的 DistSQL 以及面向开发者的可插拔架构。
+
+本章节将详细阐述 Apache ShardingSphere 相关的概念。
diff --git a/docs/document/content/concepts/_index.en.md b/docs/document/content/concepts/_index.en.md
index 018cb74..b5c9c7c 100644
--- a/docs/document/content/concepts/_index.en.md
+++ b/docs/document/content/concepts/_index.en.md
@@ -5,4 +5,8 @@ weight = 3
 chapter = true
 +++
 
-This chapter describes concepts about Apache ShardingSphere. Please refer to [User manual](/en/user-manual/) for more details.
+The functions of Apache ShardingSphere are pretty complex with hundreds of modules, but the concepts are very simple and clear. 
+Most modules are horizontal extensions faced to these concepts.
+The concepts include: adaptor faced to independent products, runtime mode faced to startup, DistSQL faced to users and pluggable architecture faced to developers.
+
+This chapter describes concepts about Apache ShardingSphere.