If you are under 26, a graduate with a bachelor's degree or above, unmarried and have a stable job in Shenzhen, all you need is an identification card, education and working certificate.
The service identification approach benefits from casting a net that has a larger scope such as the enterprise, but it can also operate under a more narrow domain that is confined to a project.
That used to be a simple device, working like a radio-frequency identification tag when it passes under a gantry on a toll road, but it is also getting smarter.