According to the submitted total pop-up data, ICBC Tiandi Rong U Shield has an error in its signature with the code 100 19. Have you done everything you need to do? The National Day Bank is on holiday again. If you have used U Shield before, now open ie Browser-Tools-Internet Options-Content-Certificates-Personal, delete those two personal certificates, and then open the client management tool-Certificates-Start-All Programs -U Shield in the lower left corner, and then re-register. I studied this problem all day and went to the bank twice. I used to use a first-generation shield, but later I changed it to a second-generation shield. The certificate with the first generation shield in the browser may conflict with the second generation shield. Just delete it in ie and re-register it. I hope my answer can help you.