of foreign language skills. English-language media in China often use the word "netizen" to refer to Chinese internet users in particular. Content According to Kaiser Kuo, the internet in China is largely used for entertainment purposes, being referred to as the "entertainment superhighway". However, it also serves as the first public forum for Chinese citizens to freely exchange their ideas. Most users go online to read news, to search for information, and to check their email. They also go to BBS or web forums, find music or videos, or download files. Content providers Chinese-language infotainment web portals such as Tencent, Sina.com, Sohu, and 163.com are popular. For example, Sina claimed it has about 94.8 million registered users and more than 10 million active ones engaged in their fee-based services. Other Internet service providers such as the human resource service provider 51job and the electronic commerce web sites such as Alibaba.com are less popular but more successful on their specialty. Their success led some of them to make IPOs. All websites that operate in China with their own domain name must have an ICP license from the Ministry of Industry and Information Technology. Because the PRC government blocks many foreign websites, many homegrown copycats of foreign websites have appeared. Search engines Baidu is the leading search engine in China, while most web portals also provide search opportunities like Bing, Sogou. Online communities Although the Chinese write fewer emails, they enjoy other online communication tools. Users form their communities based on different interests. Bulletin boards on portals or elsewhere, chat rooms, instant messaging groups, blogs and microblogs are very active, while photo-sharing and social networking sites are growing rapidly. Some Wikis such as the Sogou Baike and Baidu Baike are "flourishing". Social media China is one of the most restricted countries in the world in terms of internet, but these constraints have directly contributed to the staggering success of local Chinese social media sites. The Chinese government makes it impossible for foreign companies to enter the Chinese social media network. Without access to the majority of social media platforms used elsewhere in the world, the Chinese have created their own networks but with more users – which is why every global company pays attention to these sites. Some Chinese famous social medias are Sina Weibo, QQ, Qzone, Renren, Zorpia, and Douban. And in recent years, the use of WeChat has become more