What does the value-added service fee of China Unicom mean?

Value-added service fees include point-to-point SMS, Unicom's internal letter, point-to-point MMS, information MMS, ringtone (including function fee and information fee, OCS user bill shows that "CRBT value-added service content charges are for ordinary GSM users", that is, ringtone function fee), ringtone (including function fee and information fee), super ringtone, voice mail, handheld stock market, mobile Internet access, mobile TV, mobile newspaper and mobile music (club membership fee and information fee). The M/T charging modes of mobile phone email, mobile phone search, instant messaging and Unicom 3G services are shown in the bill, which are included in the usage fees of mobile phone Internet access, mobile phone TV and mobile phone music services respectively.