The latest info on Air China mobile apps
Like many other airlines, Air China offers an iOS app for all of your Apple devices.
For Air China Phoenix Miles members, you'll be able to manage your account from the app, though using their website will no doubt provide more functionality
Air China has an Android app that works with most Android tablets, phones, and some Android Wear devices. As you might expect, the Android app from Air China has the same familiar functions as the iOS app.
Also take a look at Air China's website by clicking here — you should be able to do what you need there.