All in the genes

Even without the high-standard requirements, clinics are struggling to get potential donors through their doors.

An employee at Beijing's sperm bank hands a container to a sperm donor.

Although a growing number of Chinese men are willing to give blood, most are still too embarrassed to even talk about sperm, let alone offer a sample. Some refuse on moral grounds, while others simply fear their friends and family will find out.

Wang admitted he has not told his parents or girlfriend about his donation because he feels they "will kill me for letting a stranger use the precious family seed".

"I'll just be glad if I can help a childless couple," said the student at China University of Mining and Technology. "Actually, I should thank them for continuing my family line."

Beijing's sperm bank, which is run by the National Research Institute of Family Planning, receives on average just two visitors a day, although a staff member said numbers are beginning to increase.

The rise is thanks largely to a build-up of trust, with collectors in the capital guaranteeing anonymity for donors by providing samples directly to hospitals to use in artificial insemination treatments, rather than to individual couples.

However, confusion over what actually happens at the sperm banks remains.

Workers at the Beijing bank told China Daily they regularly receive calls from men to ask if "the female nurses lend donors a helping hand". They blamed fake pictures published on the Internet last year.

"People have many misunderstandings," said chief consultant Chen. "The men are totally on their own (in the collection rooms). We don't even provide pornographic magazines or videos because they're illegal in China.

"What we do is very serious and strictly regulated," he added.

Taking up time

The regulations set by the Ministry of Health are simple: only healthy men between the ages of 22 and 45 can give sperm once in their lifetime. Gay men and foreign nationals are prohibited.

Some banks also encourage people from China's many ethnic groups and prefer donors to be at least 170 centimeters tall and hold a college degree, traits that top most couples' wish lists.

However, becoming a donor can often prove far from easy.

"I thought it was a one time thing but it's actually not," said Feng, a 23-year-old classmate of Wang Jian who also went to the clinic (he did not want his full name to be used). "It's too time-consuming."

Feng said he changed his mind about donating when he discovered the process can take more than 10 months.

Men must visit a sperm bank three times for initial tests and undergo blood screening if their sample makes the grade. They then have to return 10 to 15 times to donate. Six months after the last collection, donors receive a final test for HIV.

University students like Wang and Feng form the core of China's national sperm donation system. Statistics show they represent more than 50 percent of the men who visit the Beijing bank, with the proportion rising to 70 percent in Shanghai and 85 percent in East China's Shandong province. Married men account for the remainder.

"Students are much more open-minded than elder generations," said Chen in Beijing, although he admitted the ideal donor is already married with a child.

Tang Lixin, director of the sperm bank in Guangzhou, capital of Guangdong province, said his clinic has had some success cooperating with student unions.

"Union members normally talk to students one on one in private about sperm donation, which works for us, although it takes time," he said, adding the bank used to promote its services with posters and leaflets but it proved ineffective.

In September this year, Li Zheng, director of Shanghai's sperm bank, gave a lecture at the city's Fudan University and Tongji University to raise awareness. Shortly after, more than 300 students reportedly contacted his clinic.

One thing that has helped attract young people to donate is the cash incentives. Sperm banks pay 200 yuan ($30) for each donation, depending on the quality, as well as a bonus of up to 1,500 yuan after the final blood test.

"It's only part of the reason (I wanted to donate) but I have to say, 3,500 yuan is very attractive to me because it could cover a year's tuition fee. What I need to do for it is not difficult," said Wang.

Chen explained that it is illegal to trade sperm in China, "so we don't pay for sperm. Instead we offer a reasonable amount of cash to cover the transport costs and the donors' hard work".

Chongqing's sperm bank, the only one in Southwest China, has remained closed since late last year following a sperm trading scandal. Three managers and two employees were sentenced to between seven and 12 years in prison for earning 440,000 yuan by selling 1,000 sperm samples, mostly to medical clinics providing unlicensed insemination services.