https://blog.wongcw.com/2018/12/11/uber%e7%99%bc%e7%94%9f%e5%85%a8%e7%90%83%e6%80%a7%e5%ae%95%e6%a9%9f%e5%ae%98%e6%96%b9%e5%b0%9a%e6%9c%aa%e7%b5%a6%e5%87%ba%e8%a7%a3%e9%87%8b/
Uber發生全球性宕機官方尚未給出解釋