diff --git a/README.md b/README.md
index 50217db..cc36f52 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 3. Parallel KD-Tree Search to decrease the computation;
 4. Robust feature extraction;
 
+It should be noted current version of FAST-LIO does not support Velodyne LiDAR, we may support them in the future.
+
 **Developers**
 
 [Wei Xu 徐威](https://github.com/XW-HKU): Laser mapping and pose optimization;
@@ -52,7 +54,7 @@ Clone the repository and catkin_make:
     source devel/setup.bash
 ```
 ## 3. Directly run
-### 3.1 For indoor environments and high frame-rate (maximum 100hz)
+### 3.1 For indoor environments (support maximum 50hz frame rate)
 Connect to your PC to Livox Avia LiDAR by following  [Livox-ros-driver installation](https://github.com/Livox-SDK/livox_ros_driver), then
 ```
     ....
@@ -81,14 +83,7 @@ Download [avia_indoor_quick_shake_example1](https://drive.google.com/file/d/1SWm
 roslaunch fast_lio mapping_avia.launch
 rosbag play YOUR_DOWNLOADED.bag
 ```
-### 4.2 High-rate rosbag (Livox Avia LiDAR with 100Hz frame-rate)
-
-Download [high_rate_avia](https://drive.google.com/file/d/1UM6O3PRN3b730ZeuvKKT3yuOLNQuz8Yf/view?usp=sharing) and then
-```
-roslaunch fast_lio mapping_avia.launch
-rosbag play YOUR_DOWNLOADED.bag
-```
-### 4.3 Outdoor rosbag (Livox Avia LiDAR)
+### 4.2 Outdoor rosbag (Livox Avia LiDAR)
 
 <div align="center"><img src="doc/results/HKU_MB_002.png" width=100% /></div>