Osteotomy is a method to remove the bone of mandible and change the face shape through surgery. This kind of surgery is usually used to improve facial contour and narrow mandibular angle, but it may also lead to some risks and side effects, such as pain, swelling, limited facial expression and so on.
The change of mandibular angle shown by Zhao Lusi in some photos may be caused by makeup, hairstyle adjustment and other reasons. So I'm not sure if she has had an osteotomy.
Generally speaking, there is not enough evidence to confirm whether Zhao Ruth has undergone osteotomy, so we can't draw a conclusion.