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What happened when ABC downloaded the input reference number and authorization code of K guarantee and prompted that the two codes did not exist?
First, choose your own K-treasure type correctly,

Then carefully and carefully input the 2-code,

Pay attention!

long characters like the letter "o" are actually numbers "";

What's more, it looks like the letter "O", but the number "" still doesn't work.

It's actually the letter "Q", because the password letter is copied, so it is easy to crease, thus blocking the small tail of "Q".