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. 2021 Jun 16;12:608211. doi: 10.3389/fpls.2021.608211

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Copyright © 2021 Shan, Ling, Zhao, Li, Wang and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Overview of the study area. The vector map of China was obtained by vectorizing the Chinese map [Approval Number: GS (2016) No. 2893] supervised by the Ministry of Land and Resources of China.