In a 2011 study of app piracy in China, a report found that 17 percent of apps available in Chinese app stores were either pirated copies or packaged by someone other than the original developer.
In addition, 85 percent of the apps available in a store for jail-broken phones in China were pirated copies.
Source: Roger Yu, “App piracy in China hurts developers’ bottom lines,” USA Today, August 14, 2012.