HEFEI: Green development conference attendees in Huangshan City in east China's Anhui Province earlier this month had a new experience. The event was "zero-carbon" and paper-free.

Unlike traditional meetings, attendees of the 2021 Xin'an River Green Development Forum & Ecological Products Expo did not receive any paper document but a QR code. All conference schedules and guides would show on the attendees' cellphones when they scan the QR code.

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