What is the charging standard of Unicom SMS, and how many free SMS messages are there every month?

Unicom's domestic standard tariff for point-to-point SMS is 0. 1 yuan/article.

Depending on the package you choose, some packages will have a certain number of free text messages. For details, please call the local Unicom customer service hotline to inquire about the contents of the selected package. If the number of short messages is not included in the package, the short message superposition package is not applied, and domestic point-to-point short messages are sent according to 0. 1 yuan/article, and received for free.