Unless your company is Xiaomi, Apple’s huge advantage in China is that you get timely updates to the phone operating system, since Apple controls the update process, not the cellphone carrier. As such, most iPhone 6 and 6+ models sold are already updated to iOS 8.3, and the majority of iPhone 5, 5S and 5C models are also updated to the iOS 8.3.
I updated to iOS 8.3 on my iPad about a week ago. The iOS devices do upgrade to the relatively recent updates ... with the two most recent major update (iOS 7 and 8) covering practically all the devices. This makes it a lot easier on the developers who make all this good software.
That’s because not ever vendor puts its own stupid skin and hacks on top of the OS like Android... So, you will never see Android updates reliably and regularly released because every damn vendor has to recompile, test etc their code, and guess what? They aren’t software companies so they don’t waste their time, they just focus on wedging their skin on the latest version for their next phone... no money to be made trying to backport it to their older devices.
Xiaomi is copying Apple's business model on this. . . but not paying for the Intellectual Property they are using in their phones and tablets which gives them a competitive pricing edge on their competition who does pay for the proper licensing of the components and software in their phones and tablets. At least Xiaomi is doing ONE thing right. . . but their CEO emulates Steve Jobs in how he dresses when he gives product announcements.