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The Fourth United Nations World Data Forum has kicked off in eastern China's Hangzhou city on April 24. The event includes discussions on how data can be better used to help achieve the United Nations' Sustainable Development Goals. This is the first time that China hosted the forum, as well as the first in the Asia-Pacific region. The forum will last four days with over 100 events and 70 sessions. Four main topics to be discussed include data innovation and cooperation, exploring data's value for better decision-making, improving data credibility and building a sound data ecology.