What does the platform uplink SMS fee mean?

Short message to communication service provider. The short message fee on the platform refers to the short message sent to the communication service provider, which is used to customize a service, complete a query or handle a business. For example, the short message of China Construction Bank about the balance is: the last four digits of CXYE# account. Generally, the uplink SMS fee is GSM 0. 10 yuan, and Bank of China 0. 10 yuan. The other uplink SMS charges are different according to the content and columns received, except that this one in the SMS is free.