No.56 Changsha Popularity Ranking No.22 Changsha County No.82 Hunan No.1 Di Kong Jing Ji No.1 Testing Systems No.2 Sensors No.2 Lei Da Technology No.2 Security Electronics No.2 Security Technology No.2 Wei Bo Lei Da No.3 Lei Da No.3 System Integration No.3 Security No.4 Emergency No.4 Communication Technology 双软认证 专精特新小巨人企业 专精特新企业 中国红星奖 院士工作站 知识产权优势企业