What kind of service can China Unicom use without inserting a physical card?

The eSIM products launched by China Unicom are all virtual card services. ESIM is a technology that supports remote configuration and management of user authentication data (including downloading, changing and deleting), and its application scope includes M2M services and public services. ESIM makes SIM card electronic and Internet-based, and can realize remote instant card issuance and card opening. For the wearable products of eSIM, China Unicom's eSIM services include: independent number service, No.1 dual terminal service, main and secondary card service.