What does it mean that CCB cards in different places prompt that the PIN format is wrong?

PIN is the U-shield password, and the wrong format means the wrong password.

If it is a U-Shield customer, the PIN code is the U-Shield certificate password. The U-Shield password is in the form of 6-8 digits or letters or a combination of the two. If you download the certificate information at the counter, the U shield password is generally 12345678. If you download the certificate information through online banking, the U shield password is set by yourself during the download process.

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