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A staff member shows a bike made with nano materials during the CHINANO 2018 Conference & Expo in Suzhou, east China's Jiangsu Province, Oct. 24, 2018. (Xinhua/Wang Jiankang)
A staff member shows a bike made with nano materials during the CHINANO 2018 Conference & Expo in Suzhou, east China's Jiangsu Province, Oct. 24, 2018. (Xinhua/Wang Jiankang)