Xuzhou Dae-A Automans Co., Ltd. is one of the earliest companies which produces and researches window openers in China. Our 80% products are exported to Europe and other areas. Since 1999, we have professionally studied smoke controller system, and set up a lab for it. In 2003, we were approved by QS9000:1998 and ISO9001:2000 from TUC Suddeutschland Group of Germany. At the same time, our window openers had CE certificate from CCQS UK LTD. In 2005, we were also approved by China Fire Fighting Bureau. Our window openers and systems have good quality, which can be used for kinds of buildings and skyscrapers.Because of high quality and good reputation, many famous buildings have used our window opener systems in China, for example, all stations of Qingzang railways, six gymnasiums of Beijing Olympic, Shanghai Fire-Fighting Center, Fudan University Guanghua Building, Tongji University Tongji Mansion, Shanghai City Plaza, Shanghai Baiyulan Plaza, Sanya Airport and Beijing Subway Stations.