https://blog.wongcw.com/2022/05/09/%e4%b8%ad%e5%9c%8b%e8%81%af%e9%80%9a%e6%8e%a8%e5%87%ba%e9%8a%80%e9%bd%a1%e5%8d%a1%ef%bc%9a%e8%80%81%e5%b9%b4%e4%ba%ba%e5%b0%88%e5%b1%ac%e6%89%8b%e6%a9%9f%e5%8d%a1%e7%9b%b8%e4%ba%92%e9%96%93%e5%85%8d/
中國聯通推出銀齡卡:老年人專屬手機卡相互間免話費