中国应该是世界上最大，最好（手机普及率高，消费率也高）的data mine了吧。做AI
就需要这个。中国政府应该限制外国公司无偿对这些数据的使用。 https://www.cnbc.com/2018/02/06/apple-to-build-a-second-data-center-in-china
-report.html
Apple will build its second data center in China at Ulanqab City in the
Inner Mongolia Autonomous Region.
The data center would be Apple's first in north China, commencing operation
in 2020 and offering iCloud services on the Chinese mainland.
