Guo Mingyi may be just a rank-and-file worker at the Anshan Iron and Steel Group in northeast China's Liaoning Province. But his desk drawer is full of blood donation certificates, receipts for cash remittances sent to poor families, and thank-you letters from the children he has supported.

Guo Mingyi has donated 60 liters of blood over the past two decades.

52-year-old Guo has worked more than 15,000 hours of overtime over the past 15 years, in the process benefiting his company enormously, but also helping to finance his charity work.

He has donated 60 liters of blood over the past two decades - equal to the blood volume of 10 adults. And he is always trying to round up other people to become blood donors.

When Guo made his first blood donation in 1990, he realized that hospitals were always short of blood. Since then, he has donated blood 54 times, enough to save the lives of 75 people.

He also founded two blood-donation clubs that now have a total of 800 members, and he persuaded another 1,700 people to donate life-saving stem cells to treat leukemia patients.

In 2006, when Guo heard that a workmate's daughter had been diagnosed with leukemia, he immediately set about trying to find people whose blood matched the girl's.

He persuaded 400 of his workmates to take tests. One turned out to be a match and the 13-year-old girl was saved.