Stress, long hours and an unhealthy lifestyle can have serious, even terminal, consequences. Liu Zhihua reports.

Shi Wenxiong, a 41-year-old from Beijing, says he only survived a heart attack three years ago because he was lucky.

One morning in September 2008, Shi, a manager at Shunyi Gardening Service Center of Beijing, went to work as usual but when he arrived, he started having heart palpitations and felt unwell.