- Dongguan is known as China's sin city
- Authorities have cracked down on the sex trade
- But a recent visit suggests it has gone underground
In the evening, he'd take them to a KTV, a karaoke entertainment establishment often synonymous with sexual services.
There, a "mamasan" -- a name given to a woman in charge of running businesses at brothels -- would line up a dozen young women, mainly Chinese but also Japanese, Korean and -- the most expensive of all -- Russians.
"You choose one or two, sing and drink and have a bit of fun, and then go to a room upstairs for some 'business.' Not love, only business," said Han, who used a pseudonym as prostitution is illegal in China.
Today, doing that type of business is becoming increasingly difficult.
In February 2014, the government launched a crackdown on the sex trade in Dongguan
, which has been dubbed China's "Sin City."
More than 2,000 hotels, saunas and massage parlors that catered to the city's migrant workers and visiting buyers were shut down
, according to state media.
Thousands of people were arrested
, including suspected operators and organizers of prostitution, alongside high-ranking officials and corrupt police officers.
The city's vice mayor, who was also head of the city's public security bureau, Yan Xiaokang, was removed from his posts.