Why should China immigrants transfer to 59 yuan for three years in 79 yuan?

There are also value-added services. China Mobile's package contains limited call duration or traffic. During the contract period, the package fee will be deducted every month. Users have to pay three years to use China Mobile 59 yuan Package, which is caused by the value-added service in 79 yuan. Users can call the customer service hotline to cancel the value-added package.