If you search the topic in baidu of the last week's price rise, and you search in Chinese, most posts and reports ascribe it to the recent adoption of bitcoin payment method by a web service of Baidu (jiasule.baidu.com).

These reports suggests that the adoption by Baidu is a signal that the big vendors are accepting bitccoin - consider the close tie between baidu and central government, that the government may be interested too. It is like saying Microsoft or Facebook started to accept bitcoin. That tapped on the emotion and BTC rose.

I think the big vendors are no way closer to accepting bitcoin in the last week than any weeks before. It is indeed a small change, and signals nothing from big vendors nor the central government at all.