Is it illegal to send text messages to China from abroad?

It is not illegal to send text messages to China abroad.

When someone sends a text message to his mobile phone after going abroad, he can receive it;

The premise is that international roaming must be opened, and the mobile phone card that does not open international roaming has no signal after going abroad and cannot receive SMS and phone calls;

Mobile phones that can roam internationally can be used both at home and abroad, and can answer phones, make phone calls, receive short messages and send short messages;

Generally, it is free to receive short messages when roaming internationally, but it costs money to send short messages. Different countries have different charging standards, so you can consult the local business hall.