First click on the agricultural bank of China's K-treasure tool in the lower right corner of the screen, and click to view your own K-treasure status.

K-Bao has many models. Generally speaking, signing is to press the button of K-Bao.

Maybe the certificate has expired. Go to the outlet and print it with QR code before downloading. The validity period of the certificate is generally 1-2 years, and a new application is required after the expiration.

There may be two certificates. Try another one.