The scapula or shoulder blade of Xuanhuaceratops has an acromion that is placed more distal than the shoulder joint, while that of Chaoyangsaurus is on a level with the joint.
A comparison of the scapulae reveals a difference in acromion placement between Xuanhuaceratops and Chaoyangsaurus, with Xuanhuaceratops having its acromion positioned more distally relative to the shoulder joint compared to Chaoyangsaurus.