When users of Shuangchengtong service send short messages, in what scenario will the virtual number be displayed?

Only when the user sends a short message to the user to which the virtual number belongs will the virtual number be displayed on the other terminal.

Shuangchengtong (one card with two numbers) service means that users can apply for another Tianyi number in addition to the existing Tianyi number, and users can call two numbers to call in and out short messages without changing or adding cards. The Tianyi number sent by the user's UIM card is called the main number (referred to as the main number) in this service, and the number added when accepting the service of two cities (one card with two numbers) is called the virtual number (referred to as the virtual number).