How to send short messages to supermarket members?

When the supermarket meets its members, it will send them short messages to inform them. Just do these two steps:

Export the mobile phone numbers of supermarket members in the supermarket system to an excel table. Each line of the form has a mobile phone number.

2. Copy the content of the short message to be sent to the number box above, with a button on the left. The mobile phone number is imported or copied. I'm ready. It's been sent for five seconds. It's all here. Choose to send it the day before, so that everyone can have a reaction time when calling friends.