What platform is the SMS for safe travel sent?

This kind of blessing does not refer to a certain platform, but generally appears in various occasions.

Greetings between relatives and friends are all sent by personal mobile phones. When a company or enterprise goes on a business trip or gives a business trip to an employee, it will send it through an internal communication platform or an enterprise short message platform. Social software sends blessings in groups, such as WeChat group and Nail group. Service providers related to transportation and tourism, such as airlines, railway companies, travel agencies, etc. , send greetings when sending travel reminders to users during holidays or special periods.