Quoting from the coindesk article
"In September 2013, approximately one CNY trade was carried out per three USD trades. At the moment, the situation is quite different, as CNY accounts for more than two thirds of all deals and on most days it outpaces the dollar by a ratio of at least 1:3."
Every single USD trade, apart from the occasional special offer, is subject to a fee. It's inevitable that there'll be less of them because it costs to buy and sell.
If it doesn't cost you a bean to switch between BTC and CNY then you'll be trading like a mad person.
That's trade volume, not coin ownership. It could be one coin being batted around thousand of times a second.