Floor 7, Block B, Zhong Ding Building, No.8 North Third Ring Road West/KLOC-0, Haidian District, Beijing (near Dazhong Temple)
Dana Technology, 3rd Floor, West Side of Zhenbei Building, No.6 zhushikou East Street, Chongwen District, Beijing.
No.725 Yard 1 Building, No.7 Jinsong District, Panjiayuan, Chaoyang District, Beijing
Floor 3, Science Park Complex Building, Hongfu Pioneer Park, Changping District, Beijing
No.69 Yangzhuang Street, Shijingshan District, Beijing (Dana Training Building, Shougang Factory)
I don't know what you are looking for, but I know this. Hope to adopt