A massive police crackdown on prostitution in the southern Chinese city of Dongguan could subtract at least 50 billion yuan ($8.15 billion) from its gross domestic product and potentially have an impact on the national economy as well.

Analysts interviewed by the South China Morning Post provided that figure, which is equivalent to roughly 10 percent of the GDP of Dongguan, a key manufacturing center.

On Monday, more than 6,000 police raided roughly 2,000 establishments, including hotels, massage parlors and bars, that were suspected of serving as fronts for prostitution.

The crackdown, ordered after an expose on the thriving sex industry in Dongguan was aired by state broadcaster China Central Television the day before, resulted in the shuttering of 12 sex-trade venues and 67 arrests.

Guan Quingyou, an economist with Minsheng Securities, provided the 50-billion-yuan figure in a note to investors.

He said the central government "must be sending a message to Guangdong province (where Dongguan is located)" regarding the proliferation of certain sex-industry establishments in the city.

Lin Jiang, dean of the Finance and Taxation Department at Lingnan College, part of Sun Yat-sen University, said the estimate was "credible" but that the "actual figure could be even higher."

"It will have a serious impact on the local economy ... The crackdown will also hurt investors' confidence and weaken the city's long-term economic growth," Lin added.

Guan, for his part, said the crackdown on Dongguan's sex trade could even harm the broader Chinese economy.

"We may see the impact in national economic statistics as early as March, he said. EFE