2019 7 15 | | | 2019 12 30 | 2020 | 1 1 | | | | | 800 3 | 21 | 132 644 | | | | | | | | | | | | | | | | | 6*24 | 6 | | | | | | | | 5G + | | 5G | | 5G | | | | |