- Beijing AD Group
- Address:poch Center, 4th BRoad, Haidian
- Zhejiang Surveying Instrument Co.,Ltd
- Address:Huku Industry Zone, Yongkang, Zhejiang
- Tianjin Jing Feng Surveying Instrument Co.ltd
- Address:zhongxin street tianjin ,china, Tianjin, Tianjin, China
- Hangzhou Guchem Industrial Co., Ltd.
- Address:qingchun road, hangzhou, zhejiang, China
- Jilin Tianhua Opto-electrical Technology
- Address:Torch road 286,High Technology district, Changchun, Jilin, China
- Newsandgy Optronics
- Address:170 Xingye Road, Mawei Science, Fuzhou, Fujian, China