What is the short message of telecom running 300M traffic?

Estimate the flow in the package and the flow of gifts separately. That's what we do here, just deduct the free traffic first, and then deduct the traffic in the package after the deduction. What you find is the traffic in the package. The gift flow is not deducted, and the remaining flow in the package remains unchanged. You can query the usage and remaining situation of the traffic in the package and the traffic given by the network hall.