Chongqing Kai County Municipal Transportation Engineering Construction Cheng Shi Gong Jiao Jiao Tong Shu Niu Zi Chan Jing Ying High-speed Rail Transportation Services Cheng Shi Jiao Tong Transportation Transportation 文明单位 高新技术企业 省级创新型中小企业 市级专精特新中小企业 市级创新型中小企业 省级高新技术企业 市级高新技术企业