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Roles Investigation, Methodology, Resources, Writing – review & editing Affiliation School of Journalism and Communication, Tsinghua University, Beijing, China ⨯ Roles Investigation, Writing – review & editing Affiliation College of Geoscience and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing, China ⨯ Roles Investigation, Writing – review & editing Affiliation College of Geoscience and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing, China ⨯ Roles Investigation, Writing – review & editing Affiliation College of Geoscience and Surveying Engineering, China University of Mining and Technology-Beijing, Beijing, China ⨯ Roles Funding acquisition, Writing – review & editing * E-mail: