a case study of “5G+automotive industry” a case study of Guizhou tobacco industry a case study of the coal industry a case study of Beijing cartoon industry a case study of China's fuel cell industry 数字化转型、价值链重构与服务化创新：以5G+汽车产业为例：a case study of “5G+automotive industry” a case study on the locomotive & rolling stock industry a case study of electronic information industry in China a case study of Henan province a case study of Qingdao City