Does China Mobile SMS change traffic package take effect immediately?

Hello, if you are a customer of Beijing Mobile, the effective time of the mobile data traffic package is: if you launch a new data traffic package or a standard mobile data traffic package this month, the newly applied package will take effect in the same month, and the fees and available traffic in the effective month will be converted according to the remaining days of the month, and will be implemented according to your package from next month; If you have another gear mobile data traffic package this month, switch to a new package, which will take effect next month. Please refer to, thank you!