The problem of label in v2x_c：what's the difference of label_camera and label_kittilidar?

[duyuwen-duen]

What does camera reference and radar reference refer to in the label? What is the difference between them? They both describe the position of objects in the same virtual LiDAR coordinate system, and theoretically they should be the same? But in fact ,the location and the size of object are different.Do 000009.jpg and 000009.json labels correspond? I found that they didn't correspond by drawing the bbox, but were misaligned by two frames.
use label_kittilidar_000009.json to draw on 000009.jpg

use label_camera_000009.json to draw on 000009.jpg

[duyuwen-duen]

use label_kittilidar_000009.json to draw on 000011.jpg