Call to inquire about the trip to Taiwan Province Province.

Your mother didn't open it, so she shouldn't have received it. ....

I suggest that when you call the other party, add a+sign before the phone number, then the country code "86", and then your phone number, so you don't have to worry about where the call is made ... When the phone system encounters a plus sign, it will automatically recognize that the number behind it is the country code. .....