How much is the supplementary card of China Unicom?

The main card package is different, and the charge for the secondary card is different. If you apply for the 4G national 76 yuan and above package, you can apply for a supplementary card, and the monthly function fee of the supplementary card is 10 yuan/month (deducted once at the beginning of the month). From the second month after the secondary card takes effect, free calls will be made between the primary card and the secondary card: the secondary card shares the traffic and voice of the primary card package, and the national answer is free. After exceeding: domestic call 0. 15 yuan/min, domestic point-to-point SMS/MMS 0. 1 yuan/piece, and the traffic outside the package is charged according to 60 yuan /GB. The part less than 1GB: 1MB to 200MB is charged at 0.30 yuan /MB, and 20 1MB to 650.