Humanized design, exquisite appearance, high-grade. Flexible opening and easy operation. It is suitable for the installation of casement doors and sliding doors. It can be used for 2-fold, 3-fold, 4-fold, etc. The screen door can be maximally ventilated after being closed, and at the same time can be maximally lighted after being opened, and has good permeability. Diamond net can be configured to prevent mosquitoes and mouse bites, and to achieve the anti-theft function.