Will China Mobile Broadband charge for playing large-scale games?

Here's the thing. You have to spend a certain amount of mobile phone bills every month. I wonder if the specific amount is the same everywhere. Mine seems to be a pure phone bill (only local calls and long-distance calls and no other charges) and needs to reach 20 yuan every month. The specific operation is as follows: If you pay 600 yuan, 600 yuan will be in your public account, and then they will deduct 50 yuan's mobile broadband fee from your mobile phone every month. If your monthly phone bill reaches the amount I mentioned above, you can take this 50 yuan (that is, 600 yuan) out of your public account and return it to your mobile phone at the beginning of next month. If you can't reach the amount you need to spend next month, you won't refund it. And it's disgusting that * * * has an account with a validity period of only 1 year, and all the money will be deducted after the expiration.

I was short of a few cents last month, but I deducted 50 yuan more. I asked 10086 several times before I made it clear. That's why one share is added.