The Chinese government has blocked access to Facebook in China since 2009. The reason behind this ban is largely due to the Chinese government’s strict control over internet content and online communication within China.

Facebook, like many other western social media platforms, has been blocked in China due to its potential for spreading information and ideas that may be considered sensitive or politically destabilizing by the Chinese government. The Chinese government has a history of strict internet censorship and monitoring, and blocking Facebook is part of its larger effort to regulate and control online content within the country.
China has its own social media platforms, such as WeChat and Weibo, which are heavily monitored and censored by the government. These platforms are required to comply with Chinese laws and regulations, including strict rules around what content is allowed to be shared online. By banning Facebook, the Chinese government is able to limit the flow of information and control what Chinese citizens can access online.
It is worth noting that the ban on Facebook in China is not unique, as many other western social media platforms, such as Twitter, Instagram, and YouTube, are also blocked in China for similar reasons. While there have been some efforts to lift the ban on Facebook in China, the Chinese government continues to maintain strict control over internet content and communication within the country.