Micro blogs, like the social networking site Sina Weibo, have improved authority's efficiency in handling anti-corruption cases, but also pose challenges in distinguishing true from false, according to a recently released report by Shanghai Jiao Tong University's Public Opinion Research Lab.

Of the 24 widespread micro blog reports this year, nine have been confirmed as frauds, the report said.

"The micro blog plays a major role in fighting corruption nowadays, but posts online need to be carefully sifted to find what is reliable information," the report said.