How does China Unicom inquire about the usage of short message traffic in the current month?

"log in to Unicom's online business hall, click phone bill inquiry > phone bill inquiry > detailed bill inquiry, and select the detailed bill to be inquired (such as phone bill, SMS and MMS bill, value-added service bill, Internet traffic bill, WLAN bill, etc.). ) Inquire about your detailed bill for the last six months (including the current month). For details, please contact Unicom customer service. "