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Pasting method: as shown in Figure 2, first tear off the white paper of the QR code
label, paste the transparent surface onto the ceiling, and then tear the transparent
surface, taking care not to drop the round or ring spots during the tearing
process, after completion As shown in Figure 3.
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Where to place the QR code label
As shown in the figure: in
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Place QR code at the corner and intersection
Click the left menu bar to switch to QR code mode