2020 | | | | | 2018 2020 | 2020 | | | | | 39 | % | | | | | | 1. 2018 2020 | | 2020 | 2. 2018 2020 | | 2020 | 3. 2019 2020 | | | 2020 | 4. 2019 2020 | | | 2020 | 5. http:nmt.nmg.gov. | cn/gk/zfxxgk/xxgkml/gsgg/202003/t200331_166200.html | |