Established in 1989, China Wing Engineering Limited is a civil engineering company which specializes in proprietary roof cladding systems , wall cladding systems and structural steel work. Our company has maintained an excellent reputation for providing high-quality products and services in the industry. With the steady growth of our business, China Wing has entered the mainland China market in 2000 and has since then served both the public and private sectors. Today, China Wing Product Series are used in a variety of large-scale projects including roof, wall, and stee l structure design and installation works. The diversity of our products played an important role on catering the market expansion and customer needs. Our popular series -- Seamless Aluminium Alloy Roof Panel, Rock Wool Composite Wall Panel, PU Roof & Wall Cold Storage Series (include mobile cold storage ) are widely used in mainland China and Hong Kong . The panel uses color steel and rock wool composite in between. You can choose wrinkle or smooth surface. There are three pressing shapes to choose from, namely square, deep channel shallow channel.