From the very beginning of its establishment in 1998, Beijing SNG Connecting Technology Ltd. (SNG) has set focus on resistance welding technology for Body-in-White manufacturing. Nowadays SNG has profound experiences in design and production of welding guns for numerous automotive customers, for instance Volkswagen, Audi, Mercedes-Benz, BMW and a dozen of domestic automotive companies, accumulating up to more than 20,000 sets of welding guns for their applications in China. SNG has more than 90 professional employee including 1 doctor and 6 postgraduate student, and numerous invention patents. SNG is not only High and new technology enterprises, specialized and sophisticated SMEs, but also has won multiple key scientific and technological projects in Beijing. Especially SNG’s digital spot welding product line of DiGi Gun meets the needs of digitalizing processes in BiW production: IIoT. Application of SNG DiGi Gun and SCADA will help enterprises greatly improving their efficiency by digitalization of quality control in process, predictive maintenance work procedure, and energy optimization.