Based on the idea of prefabrication and the concept of "standardized design, factory prefabrication and integrated construction", the mode of a substation from "construction" to "purchase" is realized. The mode can be applied to the construction of grid substations, new energy power generation step-up substations, industrial substations, urban distribution network substations and other scenarios. With the goal of timesaving, small occupied land, worry-saving and economy, XJ provides users with "one-stop" services from design and equipment to construction.