Nanning WEIWEIHAI construction doors and windows Co., Ltd is a comprehensive enterprise integrating R&D, manufacturing, trading and sales of aluminum alloy profile of ZhongKai brand for building and industrial applications as well as doors, windows, curtain walls, etc. Our factory located in No. B-83 Yiling Industrial Concentration District of Wuming region, Nanning city, Guangxi Province, China. The main products are construction and industrial aluminum alloy profile of powder coating, electrophoresis and anodize, wood grain transfer, PVDF coating, fracturing bridge heating insulation, etc.

WEI WEI HAI has 22yrs manufacturing experience on construction field. Our factory mainly use alloy 6061, 6063 and 60603A to extrude into aluminum profile. We set up independent workshop of extrusion, coating, anodize, wood grain transfer, packing etc.

Our finished products are inspected by professional quality testing equipment before loading. WEI WEI HAI and its "ZhongKai" brand enjoys reputation of "brand product of Guanxi" and "Quality assured product", etc.

"Zhong Kai" aluminum alloy profile is hot-selling in domestic and very popular in southeast Asia and the Middle East market. The annual output of aluminum profile is about 50, 000 tons.