... shrinking bag.Dongwei Group engages in manufacturing and distributing of aluminium profiles, doors, windows,curtain walls and etc. ... Dongwei Group covers an area of 200,000 square meters Dongwei Grouppossesses 18 extrusion lines, ... exceeds 40,000MT. Dongwei aluminium prodcuts have won 'Certificate of Conformity of Product Quality' from CQMQuality Management System.Our products is ...