No.311 Changsha County Popularity Ranking Changsha Hunan No.3 Construction Energy Saving No.7 Heat Insulation No.9 Jie Neng Jian Pai No.19 Building Materials No.39 Materials R&D No.46 Construction No.53 New Materials No.82 Huan Bao / Energy Saving Xin Xing Construction Materials Lamination Boards Glazed Hollow Beads Lamination Boards Materials 科技型中小企业 省级专精特新中小企业 专精特新小巨人企业 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 企业技术中心