Volunteers at a suicide intervention hotline in Shanghai try to ease the burdens of callers. The mirrors help volunteers adjust their facial expressions and voice tones. [Jiang Lezhou/China Daily]

"Sometimes, I would sit in my lab staring at the equipment and ask myself over and over again, 'Why am I alive?' "

This is how PhD student Sun, 27, who did not want his full identity revealed, recalls one of his lowest points. "It was a few years ago, but at the time I just couldn't see a future," he said. "I still can't, I guess."

He eventually sought professional help, and with continued support he says he feels better.

Analysis suggests millions of young people like Sun are struggling under the pressures of work, study and relationships. Unfortunately, many are not finding the help they need.

Every year, roughly 250,000 people commit suicide in China, while another 2 million attempt to cut their lives short, according to the Ministry of Health. Although studies show the highest incidence is among elderly and rural women, the Chinese Center for Disease Control and Prevention says suicide is now the top cause of death for people aged 15 to 34.

The data "show us that this group of people needs far more help with mental health", said Lin Kunhui, founder of Life Education and Crisis Intervention Center, a nonprofit organization in Shanghai.

In December, his center launched the city's first 24-hour suicide hotline, and within a month it had received 632 calls, mostly from white-collar workers aged 23 to 35.

According to Lin, roughly 20 percent of callers needed urgent crisis intervention.

"Young people on the Chinese mainland are under a huge amount of stress, but they have few places where they can talk to someone about their problems," he said.

Suicide remains a taboo subject in China. Studies into the problem were nonexistent until the 1990s.

Michael Phillips has been looking into the issue for more than two decades, and between 1995 and 2000 he cooperated with the Chinese CDC to conduct the largest-ever study of suicide in China. He talked with families in 23 locations nationwide about loved ones who had killed themselves.