Shandong Changjian Curtain Wall Decoration Co., Ltd. was established in 1992. It started with the production of doors and windows. It was founded in Linqu, the capital of profiles, and is now located in Weifang, the capital of kites. After 30 years of ups and downs, the company has a total registered capital of 50 million yuan, an annual production capacity of 180000 square meters, more than 60 technical personnel of various types, 10 invention patents and 28 utility model patents. it has special grade II construction curtain wall, grade II anti-corrosion and thermal insulation, grade II steel structure, grade II construction door and window manufacturing and installation qualification certificate and safety production license, can undertake building curtain wall, aluminum-plastic doors and windows, anti-corrosion insulation, steel structure, fire-resistant windows, stainless steel, sun room and other building supporting projects.