When you go abroad on the plane or when you arrive at the local area, such as when you go to Beijing, will you receive a welcome message?

I will. Generally, there are two, both from China Mobile. The main contents are:

1, introducing roaming charges

2. It is suggested to call back to China with ** 139.

3. Telephone number of local embassy

You can call +86 10086 for free if you need anything.

This is basically the case, and the content of each country is similar. The latter can continue to be supplemented.