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 English | [简体中文](README-CN.md) | [TDengine Cloud](https://cloud.tdengine.com) | [Learn more about TSDB](https://tdengine.com/tsdb/)
 
+# Table of Contents
+1. [What is TDengine?](#what-is-tdengine)
+1. [Documentation](#documentation)
+1. [Building](#building)
+1. [Installing](#installing)
+1. [Try TDengine](#try-tdengine)
+1. [Developing with TDengine](#developing-with-tdengine)
+1. [Contribute to TDengine](#contribute-to-tdengine)
+1. [Join the TDengine Community](#join-the-tdengine-community)
+
 # What is TDengine？
 
 TDengine is an open source, high-performance, cloud native [time-series database](https://tdengine.com/tsdb/) optimized for Internet of Things (IoT), Connected Cars, and Industrial IoT. It enables efficient, real-time data ingestion, processing, and monitoring of TB and even PB scale data per day, generated by billions of sensors and data collectors. TDengine differentiates itself from other time-series databases with the following advantages: