I'm not sure. I think it's a bit like a pyramid scheme, and it's really not interesting. But there's nothing wrong with using his phone. It's best not to believe those things. Callback cards are not good. , that software for making phone calls is too expensive and not economical at all. It’s best not to believe it casually and do something else. I can’t believe it. I added it because of my fellow villagers’ advice, but ah, in one word, miserable! It's okay to make a phone call. The phone fee is relatively cheap. You can use it as a user. Don't register as a member. I don't think it's okay.