Does it cost money to send text messages between mobile phone short numbers?

I sent a text message asking for money according to what Salmon Xiaomi said (if it is in the dynamic zone, it will be deducted from the set meal).

If he really doesn't need money, it may be different types of cluster networks (such as companies, or parent-child families, I don't know), or different places (my Guangzhou), and the tariff will be different.

You can try it, or call 10086 directly for consultation.