Founded in 2003 and located in Nanning City, Guangxi Province, China, Nanning Weiweihai Construction Door and Window Co., Ltd is an enterprise which integrates researching, producing and trading aluminium profile,aluminium alloy window & door finished products like aluminium curtain wall and aluminum sun room for construction area Etc as a whole. Over the past 15 years, we have developed and produced a whole selection of "ZHONGKAI" brand aluminium alloy profile.