No.333 Tianxin District Popularity Ranking Changsha Hunan No.16 Construction Engineering Quality Detection No.19 Engineering Quality Detection No.19 Gong Cheng Jian Testing No.22 Testing Center No.22 Di San Fang Detection No.30 Jian Ce Ji Gou No.31 Engineering Detection No.33 Environmental Monitoring No.35 Jie Neng Jian Pai No.42 Quality Detection No.64 Environment Technology No.66 Testing Technology 科技型中小企业 省科技型中小企业 高新技术企业 省级高新技术企业 省级创新型中小企业