How does China Unicom inquire about telephone charges and traffic?

Hello, Unicom's mobile phone number can be edited and sent to 100 10 via SMS DYHF or CXHF to check the phone bill balance. Edit the short message 150 1 and send it to 100 10 to inquire about the local traffic margin. You can also use this phone number to log in to China Unicom APP- Service-Query-Query the remaining phone bill and traffic margin, which is convenient and quick.