Facebook Inc., the social media giant with biggest initial public offering in US technology company history, finds it hard to enter the world’s biggest internet market who owns billion a half netizens.

Facebook which has been blocked in China for nearly three years is continuously trying to enter China’s market. It is reported that Facebook mentioned China nine times in its filing to US Security and Exchange Commission in early February, stating that they were still making efforts to enter China

Though, to be a part of China’s internet participant, Facebook is confronted with a huge obstacle,  Beijing’s strict censorship, which aims to block any information threatening the Party’s rule.

Besides the restriction from government side, Facebook is meeting challenges from peers in China like Tencent microblogs, Sina Weibo and Renren. These three hold over 400 million, 300 million and 100 million online registered users relatively.

If Facebook successfully enters China, it would face fierce competition in the Chinese well-established social networks, according to Bloomberg.com. 

Internet users in China could log on Facebook by using complicated software, indicating Chinese neitizens’ willingness to use its service. However, it is on the basis of Facebook’s open information and platform. If it makes a compromise with Beijing, there would more or less lose its reputation in information open. Thus, Facebook may probably have not too much competitiveness compared with Sina, Tencent or Renren.