According to the group, it attacked government websites to register its protest against Chinese Internet restrictions.
'Anonymous' on its Twitter account listed the names of the websites that was hacked by it over the last couple of days. The hacked websites are located in several Chinese cities including Chengdu.
Some websites allegedly attacked by the 'Anonymous' group were functioning on Thursday and government officials denied that their website was hacked.
In one of the websites- cdcbd.gov.cn, the hackers vented their anger on the Chinese government for the restrictions it imposed on the internet.
"Dear Chinese government, you are not infallible, today websites are hacked, tomorrow it will be your vile regime that will fall," it read.
"What you are doing today to your Great People, tomorrow will be inflicted to you. With no mercy," it said.
The message also advised users on how to beat China's imposition on the Internet.
The Chinese government has banned users from seeing social media sites such as Facebook or Twitter. It also bars the users from availing information on politically sensitive topics.