Besides censorship, the GFW has also influenced the development of China's internal internet economy by nurturing domestic companies and reducing the effectiveness of products from foreign internet companies. The techniques deployed by the Chinese government to maintain control of the Great Firewall can include modifying search results for terms, such as they did following Ai Weiwei’s arrest, and petitioning global conglomerates to remove content, as happened when they petitioned Apple to remove the "Quartz" business news publication’s app from its Chinese App Store after reporting on the 2019–20 Hong Kong protests.