China has built the world’s largest and most technically advanced 5G networks, ushering in a critical period of large-scale 5G application. Large-scale 5G application is requirement-oriented, centering on services, technologies, and solutions. It penetrates from peripheral links of industry production to core links of production control to empower digital transformation in numerous industries. Figure 13.1 shows the triangular model of 5G + X large-scale application.