diff --git a/docs/en/02-intro/index.md b/docs/en/02-intro/index.md
index db28cdd939..83b4322011 100644
--- a/docs/en/02-intro/index.md
+++ b/docs/en/02-intro/index.md
@@ -103,7 +103,6 @@ As a high-performance, scalable and SQL supported time-series database, TDengine
 
 - [Writing Performance Comparison of TDengine and InfluxDB ](https://tdengine.com/2022/02/23/4975.html)
 - [Query Performance Comparison of TDengine and InfluxDB](https://tdengine.com/2022/02/24/5120.html)
-- [TDengine vs InfluxDB、OpenTSDB、Cassandra、MySQL、ClickHouse](https://www.tdengine.com/downloads/TDengine_Testing_Report_en.pdf)
 - [TDengine vs OpenTSDB](https://tdengine.com/2019/09/12/710.html)
 - [TDengine vs Cassandra](https://tdengine.com/2019/09/12/708.html)
 - [TDengine vs InfluxDB](https://tdengine.com/2019/09/12/706.html)