Mirror of the sky series is a narrow edge broken bridge window, gauze fan integrated outward opening system window. The window and gauze fan integrated, the narrow edge design and double-sided frame and fan inside and outside flush design, full of aesthetic feeling, three-dimensional sense is stronger. The protective grille can be opened, when it closed, which can prevent burglary and children climbing the window; when it opened, it can escape in an emergency, improve the safety of home life. The application of continuous bending integral sealing technology, improve the overall performance of doors and windows, quality upgrade.