2018-2-24
2018年2月起，苹果在中国大陆icloud数据中心，会由苹果和云上贵州共同运营。
苹果官方发出的邮件：
Dear XXX,
Thank you for using iCloud. We have some important information about iCloud in the mainland of China to share with you.
中国大陆的iCloud服务由云上贵州提供，这是为了在中国合规。
Apple recently announced a partnership with Chinese internet services company Guizhou on the Cloud Big Data Industrial Development Co., Ltd. (GCBD-云上贵州) to provide iCloud services in the mainland of China. This will allow us to continue to improve the speed and reliability of iCloud and comply with Chinese regulations.
从2月28日起，云上贵州正式接手iCloud服务。
Starting February 28, 2018, the operation of iCloud services associated with your Apple ID XXX will be transferred to GCBD. Use of these services and all the data you store with iCloud, including photos, videos, documents, and backups, will be subject to the Terms and Conditions of iCloud operated by GCBD. Aside from this change, your iCloud service will continue working without interruption.
如果你不是中国人，可以使用如下方法更改自己的国家或区域。
If you are not a Chinese citizen residing in the mainland of China, you can edit the country or region setting of your Apple ID to reflect your current country or region and continue using iCloud under Apple’s current terms and conditions. Read more about how to change your country or region of your Apple ID and iTunes Store or App Store in frequently asked questions about iCloud operated by GCBD.
如果你是生活在大陆的中国人，不想使用云上贵州提供的iCloud服务，可以按照如下方法取消自己的iCloud账户。
If you are a Chinese citizen residing in the mainland of China and don’t want to use iCloud operated by GCBD, go to https://www.icloud.com/optout to deactivate your iCloud account.
收到这封邮件后，我立即采取行动更换了自己苹果ID的国家属性，虽然网上介绍了众多更换到香港地区的方法，但是考虑到2017年末在澳门发生的微信事件，最终还是费了点周折切换到美国地区。
但是，由于部分app只有在国内能下载，我经常需要在两个苹果ID之间切换，手机终端还好，在mac总是找不到简便的切换方法。
经过今天摸索，发现mac上操作也很简便。
1.进入app store。
2.点击右下角的国旗（国家）。
3.进入国家选择页面，选则美国或者中国，然后重新在右上角的账户-account里重新登录即可。