Is the SMS center number your own phone number?

China Mobile, the number of the SMS center starts with +86 1380, followed by a four-digit area code (telephone area code), such as 057 1 (Hangzhou), and finally 500.

For areas with an area code less than four digits, the area code should be supplemented by 0 in the fourth digit, such as Beijing 0 100. China Unicom, the number of short message center starts with +86 130 10, followed by the number of short message center assigned by provincial branches, and finally 500.