The growing number of influential Weibo commentators are increasingly opening their own online shops or promoting products.
Customers trying to shop at Amazon.com Thursday afternoon found the store shut down for about an hour due to a technical problem.
A spokesman says the problem was internal and not caused by a denial of service attack like those affecting Amazon and other popular sites last month. Nor was the shutdown caused by heavy traffic for Stephen King's first e-book, the spokesman adds. The book was unavailable Thursday because too many people were trying to download it.