The Chinese Ministry of Public Security and US police jointly shut down the world's biggest Chinese-language pornographic website alliance, the Sunshine Entertainment Alliance, China News Service reported Thursday.

The alliance was initiated by Wang Yong, who set up a pornographic website in the US in 2002 and then brought 48 other pornographic Chinese websites under management, forming the alliance.

Wang Yong and other key operators were arrested during the joint action.

The alliance has more than 100 million posts containing pornographic information and 18 websites that contain child porn content.

This was the first time that the Chinese Ministry of Public Security and US police conducted a joint action to crack down on cross-border online porn crime.