This March, Wang was told that the patient who had received his blood stem cells needed a second marrow transplant, and he was the only match that the CMDP could find.

Like the first time, Wang did not hesitate to say yes.

"I told my family and my doctor cousin about the donation. At first they didn't agree. But I insisted that if I did not donate this time, then my first donation would be meaningless," Wang said.

"And I told them, 'I am a man now who can take the responsibility for what I have done,'" he said. He finally persuaded his family to allow his second donation.

The process of his second donation on Monday was shorter than the first, since first-time donors have to take a drug for six days to stimulate the formation of new blood cells.

"You don't have to be anesthetized," Wang referring to the collection of the stem cells from the blood.

"The doctor hooks you up to a machine that extracts the stem cells from your blood and returns all the rest of your blood to your body.

"The only thing that troubled me was that I had to stay in the same position for three hours," Wang said.