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3. Click "Anonymous" to vote anonymously.
4. Click "multiple selection" to allow voters to select multiple options.
5. Click "Scan and Edit", and the poll initiator can edit the questionnaire options
on the mobile phone. After clicking to initiate the vote, other participants can scan
the TWO-DIMENSIONAL code on the big board to view the questionnaire.
6. Voting results support bar chart, pie chart display, voting results can be