Copyright-based industries are powering a greater portion of the overall economy, according to studies released by the National Administration of Copyright in Beijing last week.

The value generated by companies with copyrights increased from 4.94 percent of the country's GDP in 2004 to 6.55 percent in 2009.

Yu Cike, a senior official at the NAC, defined so-called copyright-based industries in four categories in accordance with standards set by the World Intellectual Property Organization: