China's Ministry of Public Security issued a class-A wanted notice for 50 fugitives suspected of major crimes on Wednesday.

The ministry, at a press conference, called on the public to report clues to the police. Those who offer useful information and help arrest the listed criminal suspects will be awarded 100,000 yuan (about 14,531 U.S. dollars) for each seized fugitive.

The wanted fugitives are suspected of severe violent crimes, crimes of property infringement and major gang crimes, among others, said the ministry.

Liu Changkai, one of China's most wanted fugitives, returns to China and turns himself in to the police, on August 31, 2017, in Beijing. [File Photo: IC]

The ministry has launched a nationwide campaign to crack down on fraud and apprehend criminal suspects at large, which will run between June 13 and Oct. 31.

So far, 57,106 fugitives, including 7,266 related to cases of serious violent crimes, have been seized by public security agencies across the country as a result of the operation, said Liu Zhongyi, director of the criminal investigation bureau under the ministry.

The move saw that a total of 1,350 fugitives were captured after more than five years on the run, another 345 arrested after more than 10 years at large.

The ministry vowed to improve manhunt efficiency by making full use of information technology means and big data resources, according to Liu.