You can handle it yourself at home. It's simple. Plug in K-Treasure, turn on my computer, find the icon of China Agricultural Bank, open the installation, then open the start in the lower left corner of the display, find "Program" and then find "China Agricultural Bank Certificate Software Tool" to open it. After you open it, you can find the "download certificate", and then enter the 8-digit reference number and the authorization code of 10 on the displayed page. Just follow the prompts for the rest. The valid date of the authorization code is 14 days. You'd better find out in the meantime, or you'll go to the bank.