Why do I often receive blessing messages from strange mobile phone numbers? Is it fraud?

Hello, this is also the case with my mobile phone. You can check the attribution of the number. If you know someone there, maybe it's your friend, maybe you don't have his phone number, you can reply. If you belong to a strange place, you don't need to pay attention at all. Maybe he sent it wrong, maybe it's spam (fraudulent information). If it's a short number, it's probably your holiday phone.