| | | | | | | | | 28 | | | | | B1 B2 D E F C A | | | | | | | | | | | | | | | | | | | | | | | | | | 2021 | | | APEC-- | | | CCTV7 | | | | | | | | | | | | | | | 1 | | | | 2 | | | 3 | | | 4 | | 5 | 6 16 | | 8.6%-36.5% | 1 8.3-22.5 | 2-3 | | 10-15 | | | | | | | | 15304758341 | |