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In page Strategic voting:

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In Hong Kong, with its party-list proportional representation using largest remainder method with the Hare quota, voters supporting candidates of the pro-democracy camp often organize to divide their votes across different tickets, avoiding the concentration of votes on one or a few candidates.[1] In 2016 Hong Kong Legislative Election, the practices of strategic voting were expanded by Benny Tai's Project ThunderGo.[citation needed] The anti-establishment camp gained 29 seats, a historical record.