In the latter part of 2013, Bitcoin skyrocketed arguably due to an increasing mudslide of Chinese capital that thought they had found a way of getting their wealth out the Chinese economy and turned into USD or whatever. The Chinese government put a stop to that....sure, they never banned Bitcoin outright, they just kind of disapproved of it and that was enough to send the majority of Chinese Bitcoiners packing.
As and when the range of Bitcoin accepting merchants increases, authorities in China and indeed authorities all across the world will surely take measures to prevent their economies and tax collecting capacity is not undermined.
Well, as I replied, Chinese authorities may still charge as high as 10% of import tax. Who cares 10% tax when you could save 46%? So this is a win-win situation: Joe gets a cheap laptop with 36% discount, and Chinese taxman gets paid