Far from being a secret, having a mistress(
情妇, qíngfù) is a new way to show off 
one’s social status in China. These “luxury accessories” require the 
maintenance of a set of unspoken rules: fancy apartments, beautiful 
clothes, and spending money. In return, the Chinese mistress often makes
 herself sexually available exclusively, dresses in designer fashions 
and flawless make-up each time she goes out with her beau, and sits 
conspicuously by his side at business and social functions.
China’s mistress phenomenon is often linked with the country’s 
materialistic culture, the result of cutthroat competition amid a 
populous society for the dazzling but limited opportunities that the 
country’s transition to capitalism presents.
Take a look at the lines of limos waiting outside of university campuses
 on a weekend night. What makes a good mistress today goes beyond youth 
and good looks to a college education and social skills. Gifts go beyond
 bling and LV bags to tuition for advanced degrees and money for 
international travel to make these status women more sophisticated and 
interesting.
Mistresses are called 
ernai(Second Woman) in China.
A district in Shenzhen has become known as 'Second Wife Village' for the number of mistresses living there. Photo by Redux/eyevine
Keeping a woman is common among powerful 
Chinese men. A study by the Crisis Management Centre at Renmin 
University in Beijing, published this January, showed that 95 per cent 
of corrupt officials had illicit affairs, usually paid for, and 60 per 
cent of them had kept a mistress.
Chinese official life had two social circles.
http://aeon.co/magazine/society/why-young-women-in-rural-china-become-the-mistresses-of-wealthy-older-men/
As the saying goes: ‘Old oxen chew young grass’
A further distinction is sometimes made between 
ernai, who ‘know their place’, and 
xiaosan,
 ‘little threes’ (as in ‘third party’), who try to insinuate themselves 
between a lover and his wife with the aim of forcing divorce and 
remarriage. In practice, the terms are used interchangeably, but the 
difference matters especially to urban girls seeking to distinguish 
themselves from their rural counterparts.
‘Most 
xiaosan have a steady job and a higher educational background than an 
ernai. 
Xiaosan
 expect to marry the man because they’ve invested so much: their youth 
and their love,’ explains the 22-year-old founder of a website for 
xiaosan in Richard Burger’s 
Behind the Red Door: Sex in China (2012).
What’s more, some young Chinese women infantilise themselves, often 
with the aid of plastic surgery, to imitate the big-eyed heroines of 
Japanese cartoons. The aesthetic is popular with older men, who are 
aroused not just by the fragile look, but by affected 
sa jiao, 
‘cute whining’, done in the fashion of a demanding child. In their 
private pictures, the girls look all of 14, while the men play alongside
 them in childish games or make faces at the camera.
http://aeon.co/magazine/society/why-young-women-in-rural-china-become-the-mistresses-of-wealthy-older-men/
Sociologists see the boom in mistresses as a result, in part, of 
China's increased wealth - even at the height of the last imperial 
dynasty only a small fraction of men could afford to support a second 
wife or lover. Mistresses were dubbed "er'nai", or second breast, a 
label that has stuck to this day.
But the phenomenon is also a result of rising inequality and the fact that men still largely hold the reins of power in China.
"China
 is still a patriarchal society. A lot of girls still think the only way
 they can get anywhere is to find a powerful man," says Prof Li.
That is borne out by many of the ads from women on Baoyang.cn.
"I
 love wearing costumes, I love everything that's pretty, I want a man 
who can improve my life, I want a better life than I have now," writes 
one girl who identifies herself as "student from Nanning" in southern 
China.
Another writes: "I have always wanted to travel but nobody 
finances me. While I am still young I can come to your city and we can 
have fun. I want 6000 rmb a month."
Many ask for much more. A 
mistress with a degree from one of the top universities in Beijing or 
Shanghai will cost tens of thousands of yuan every month, as Mr Huaung's
 ad with its request for an intelligent mistress illustrates.
"These
 women already have a good life and good earning potential but they 
can't afford the designer clothes and bags that they aspire to, so they 
find lovers to foot the bill," says Fei Yang, who runs a so-called 
anti-mistress course designed to encourage women to earn their own money
 and start their own businesses.
But beyond the monthly stipend, 
these liaisons also offer the possibility of connections that, if well 
managed, may set a woman up for life.
In this respect 50-year-old 
Li Wei is the ultimate role model. Known as the Queen of Mistresses, Ms 
Li came to China from Vietnam as a child refugee.
A plain-looking 
woman, she used her quick wit and natural intelligence to seduce a 
series of officials, starting with a member of the local Tobacco Bureau 
in the southern province of Yunnan and ending with Chen Tonghai, the 
chief of the state-owned oil and refining giant, Sinopec.
Along 
the way, many of her lovers were charged with corruption, but she 
managed to escape prosecution - and keep the billion-dollar fortune she 
had amassed - by agreeing to testify against them.
In 2011 she told her story to the Chinese magazine Caijing and immediately became something of a folk hero among women.
As many remarked at the time: "Laugh at the poor, not at the whore."
In Shenzhen, a troupe of young artists dressed as mistresses and as a 
corrupt official to speak out against corruption and the decadent behavior of officials.
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CB4QFjAA&url=http%3A%2F%2Fwww.dailymail.co.uk%2Ffemail%2Farticle-1367968%2FLi-Wei-Meet-Chinas-unlikely-heroine-lovers-billionaire.html&ei=t5XmVNC8NYyZgwTzsICwAQ&usg=AFQjCNG8CRGmf2htS17uVbf1Rn4V3TGWQw&sig2=TBz8IlvaD-Acv9l8Kj4xyw
'It showed that behind every successful woman, there are many bad men.'