diff --git a/README.md b/README.md
index 6baeb69..9ae79af 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ First Author: [**Jie Yin 殷杰**](https://github.com/sjtuyinjie?tab=repositorie
 
 
 
+> [🎯!TIP]
+> strongly recommend that the newly proposed SLAM algorithm be tested on our [M2DGR](https://github.com/SJTU-ViSYS/M2DGR) / [M2DGR-plus](https://github.com/SJTU-ViSYS/M2DGR-plus) / [Ground-Challenge](https://github.com/sjtuyinjie/Ground-Challenge) benchmark, because our data has following features:
+
 ## 🎯 NOTICE
 ### We strongly recommend that the newly proposed SLAM algorithm be tested on our [M2DGR](https://github.com/SJTU-ViSYS/M2DGR) / [M2DGR-plus](https://github.com/SJTU-ViSYS/M2DGR-plus) / [Ground-Challenge](https://github.com/sjtuyinjie/Ground-Challenge) benchmark, because our data has following features:
 1. **Rich sensory information** including vision, lidar, IMU, GNSS,event, thermal-infrared images and so on