diff --git a/mmdet3d/datasets/transforms/transforms_3d.py b/mmdet3d/datasets/transforms/transforms_3d.py
index 89759c2ee..94275d42d 100644
--- a/mmdet3d/datasets/transforms/transforms_3d.py
+++ b/mmdet3d/datasets/transforms/transforms_3d.py
@@ -2604,6 +2604,7 @@ def laser_mix_transform(self, input_dict: dict, mix_results: dict) -> dict:
         points = input_dict['points']
         pts_semantic_mask = input_dict['pts_semantic_mask']
 
+        # convert angle to radian
         pitch_angle_down = self.pitch_angles[0] / 180 * np.pi
         pitch_angle_up = self.pitch_angles[1] / 180 * np.pi
 
@@ -2624,7 +2625,6 @@ def laser_mix_transform(self, input_dict: dict, mix_results: dict) -> dict:
         out_points = []
         out_pts_semantic_mask = []
         for i in range(num_areas):
-            # convert angle to radian
             start_angle = angle_list[i + 1]
             end_angle = angle_list[i]
             if i % 2 == 0:  # pick from original point cloud