UPVC Sliding Windows can be classified according to performance, purpose of use, structure and material. Here we take the opening method of doors and windows as the classification basis from the user’s point of view. The movable windows we see every day can be summarized as casement windows, UPVC Sliding Windows, and other types. The casement windows can be divided into inner casement windows, outer casement windows, and sliding shaft casement windows; UPVC Sliding Windows can be It is divided into upper and lower UPVC Sliding Windows, UPVC Sliding Windows, and elevated UPVC Sliding Windows; in addition, other types of windows include sliding and hanging windows, and folding UPVC Sliding Windows