https://blog.wongcw.com/2020/05/24/%e4%b8%ad%e5%9c%8b%e8%81%af%e9%80%9a%e5%bc%b5%e4%ba%91%e5%8b%87%ef%bc%9a%e5%85%a8%e9%9d%a25g%e7%b6%b2%e7%b5%a1%e8%a6%86%e8%93%8b%e9%82%84%e9%9c%805-8%e5%b9%b4/
中國聯通張云勇:全面5G網絡覆蓋還需5-8年