Who can introduce GSM "88 package" in detail?

Follow-up: The call charges of the dynamic 200 package I am using are as follows: fee amount/yuan fee amount/yuan fee amount/monthly basic fee of 48.68, including mobile data package monthly fee of 20.00, monthly basic fee of 18.00, night chat monthly fee of 3.00, virtual network SMS monthly fee of 5.00, long-distance communication monthly fee of 0.68 and voice communication monthly fee of 27.00. And the local basic call charge is 3.20, Domestic (excluding Hong Kong, Macao and Taiwan) roaming call charges 4.72 virtual network call charges 19.68 value-added service charges 23.07 including mobile data traffic charges 10.45 SMS communication charges 10.88 call assistant10.74 preferential fee 0.74 including call assistant preferential price monthly fee 65434, of which: This month's total discount is 0.74 yuan/this month's total unpaid amount is 0.00 yuan/payment is required to be 98.9 yuan/kloc-0 yuan. Free account information dynamic M-value information free items are free. The actual number of virtual network short messages is 80 80 P2P and Monternet short messages are 200 200 free GPRS CMWAP, CMNET traffic is 220.00MB 220.00MB, and the local call duration of virtual network is 30 MB.