Help for bitcoin papaer wanted! Use of Bitcoin in china before the ban

[jeppe]

hi,
Im writing a paper on bitcoin and the use of bitcoin as a "currency" and not an investment. To prove that its a legitimate currency rather than an investment im planing to use chinas bitcoin economy before the ban as an example. Do you guys have any sources on how and for what goods bitcoin was used as a normal currency? Preferably china but also other places. I have a list of different companys like overstock etc that accept it but would like to focus on the market in china if possible.
Thanks,
JT