As a Chinese, I noticed that more and more of my friends turn to iPhone from Samsung... especially the iPhone 6S and iPhone 7... Samsung is now literally dead in China... You could see notices of banning Samsung Note 7 everywhere in Chinese airports....
For your information, Chinese people prefer foreign brands... But Huawei and Lenovo are exceptions, they provide many high quality products. Oppo, Vivo, Xiaomi are pretty for the low-ends, Xiaomi is transforming itself from a low-end brand to a high-end brand using the bezel-free Xiaomi Mix.
We young people prefer Apple products, older people prefer Huawei. Huawei's high-end models are not cheaper than iPhone 7 in Chinese market.
I appreciate a lot Apple's eco system, it's amazing. There is no other company who could build such a complete eco system providing smart watch, smartphone, tablet and desktop based on its cloud service. In China, more and more people are realizing the huge difference between Apple and other phone manufacturers. We enjoy buying all Apple products and linking them via iCloud. It's just so convenient.