Apple shipped 18% of phones worldwide, but when it comes to the Chinese market, it counts only 8%. You need a lots of explanations if you refuse to acknowledge the obvious here.
https://www.gartner.com/newsroom/id/3859963
Before start to waste your time, the 8% shipment in China figure was >14% just 24 months ago.
https://www.theverge.com/2015/5/11/8584277/smartphone-shipme...
To give you some extra details - I live in downtown Shanghai, as of writing, several months after IPhone X's release, I have not even seen the IPhone X yet as not any single one of my families, friends or colleagues has switched to that.