The functions of telecom diamond card are: while enjoying the personalized service provided on the basis of brand customer service standards, it can also enjoy the emergency card (machine) service according to its own needs, solve the communication interruption problem caused by the failure or loss of the original card in different places or local areas, delay the shutdown and grant the corresponding credit extension service, replace UIM card for free, and install and relocate fixed-line and broadband machines for free according to the payment time limit. Tianyi Customer Club is the service carrier and platform for China Telecom to provide various professional, personalized and differentiated services for mid-to high-end customers. Its members include diamond card, gold card and silver card. At present, China Telecom has provided its members with services in communication, business travel, transportation, shopping, catering, leisure, medical care and other fields.