Wu is the news center director of Sohu. In June last year, the web portal's news center launched a program called "Rumor Terminator" and has handled 300 rumors to date.

Soon after downpours hit Beijing on July 21, 2012, Internet users began disseminating photos of severe flooding that had been taken years earlier.

Another example involves rumors about earthquake forecasts. Internet users claim that people had successfully predicted that an earthquake would shake Lushan county, Sichuan province, as early as five years before, but these claims weren't made until after a 7.0-magnitude earthquake struck Lushan county on April 20, leaving at least 196 dead.

Such rumors had an extremely harmful influence, Wu Chenguang said, adding that the government's slow pace in releasing information has allowed Internet users to spread their rumors easily.

When explaining why rumors travel fast in China, Min Dahong proposed that it is because rumors touch on issues of common concern.

The Chinese people now care about their surroundings. Rumors travel fast because they cater to public curiosity and concern about environmental protection, food safety and corruption, he said.