China has shut down or revoked the licenses of more than 13,000 illegal websites since 2015.
Wang Shengjun, vice chairman of the Standing Committee of the National People's Congress disclosed the information when briefing lawmakers on cyberspace protection Sunday, Xinhua news agency reported.
The government has stepped up already tight controls over the internet since President Xi Jinping took power five years ago, in what critics say is an effort to restrict freedom of speech and prevent criticism of the ruling Communist Party.
The government says all countries regulate the internet, and its rules are aimed at ensuring national security and social stability and preventing the spread of pornography and violent content, according to a Reuters report.
Authorities including the Cyberspace Administration of China have called over 2,200 websites operators for talks during the same period, Wang said.
In addition, operators have closed nearly 10 million internet accounts for violating service protocol, while information on terrorism and pornography has been removed. It did not give details but the accounts were likely on social media platforms.
"These moves have a powerful deterrent effect" Wang was quoted by Xinhua as saying.
The report was submitted to the top legislature's ongoing bi-monthly session for deliberation. The session will end Wednesday.
