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Generally, the QR code is divided into 4 error correction levels: Level `L` can correct about `7%` errors, Level `M` can correct about `15%` errors, Level `Q` can correct about `25%` errors, and Level `H` can correct about `30%` errors. When the content encoding of the QR code carries less information, in other words, when the value link is short, set different error correction levels, and the generated image will not change.
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