(Level 3) Briefly describe the features and service contents of "1185" customer service.

On the basis of the existing postal integrated network, taking advantage of the widespread popularity and convenience of telephone, fax and network services, (1) integrating communication technology, computer technology, database processing technology and network communication technology (1), the various services provided by the integrated network and the green card network are integrated and extended. (1)1185 customer service includes information consulting service, inquiry service, business acceptance, complaint suggestion, postal extension service, etc. ( 1)