How does China Unicom inquire about the opened packages?

Unicom can send SMS instructions to 100 10 to inquire about its own package. Short message instruction includes digital instruction and Chinese character instruction. The digital instruction is: 208 1, that is, edit the short message "20 18 1" and send it to10010; The Chinese character instruction is: query package, that is, edit the short message "query package" and send it to 100 10. According to the above two methods, you can query the opened package.