In the use of "Didi taxi", does the driver master charge money for calling?

It depends. Didi stipulates that the communication expenses incurred by passengers and drivers due to communication and consultation shall be borne by them.

Communication fees are divided into short message communication fees and voice communication fees.

SMS communication fee refers to the fee charged after sending SMS, including information fee and communication fee.

The other is the voice communication fee. Refers to the local or long-distance telephone charges incurred when you make calls to users of China Mobile, China Unicom and telecom network operators.