It's frequently dubbed the 'manufacturing centre of the world' or the 'world's factory', but it also has a reputation as the sex capital of China.
That included step-by-step process on how to make clients happy in a 90-minute session.
Most of the young women involved are low-paid factory workers who are hoping to get married to the men in the near future.
They are still decent women.
The Weibo account of the Beijing police warned against such.
Scroll down for video Share Dongguan is an important industrial city in southern China's Guangdong province.
I told her "I already have two girlfriends, I can't have a third.
The sex trade has also mushroomed here, now catering to clientele in a variety of new spaces of recreation, including karaoke bars, 5 star hotels, decadent casinos, massage parlors, and even hair salons more than 2,500 establishments are listed in the official report.