China now has the world's largest online population

A Chinese student who says his studies suffered because of viewing pornography on the internet has won a contest for helping reduce sexual content online.

State media said the unnamed student, from northern Shanxi province, reported a total of 32 porn sites.

The Beijing News said he had won 10,000 yuan ($1,465; £913) for his efforts as part of the government crackdown.

In the first month of the campaign, 62,000 pornographic websites were reported, the paper said.

"In the past, when I was in middle school, I used to get grades that were good enough to enter a really good university," the paper quoted the student as saying.

"It is because of the influence of pornography on the internet that I was only able to go to junior college."

Internet use has expanded rapidly in China, which now has the largest online population in the world, estimated at nearly 340 million.

Its booming internet use comes despite the government's tight grip on the web.