"There simply aren't enough organs to go around," said a woman in her 50s who declined to be identified. "Saving someone's life using executed prisoner's organs is worth it. While it would be better not to, that's the reality in China."
Rules adopted in 1984 state that executed prisoners' organs can be used if the prisoner's relatives are unwilling to take the corpse or if the prisoner or his family agrees. But relatively little is known about how such organs are distributed, how organ decisions are made and which patients get preference.
Jurisdiction is a further complication. The ban on organ sales applies to hospitals answering to the Health Ministry. It is less clear whether hospitals run by the military or police -- which presumably have the most access to organs given their prominent role in executions -- will comply.
China in recent years has introduced mobile execution vans and lethal injection, supplanting the traditional method of a bullet to the back of the head. Beijing has touted these as more humane; critics say the changes facilitate rapid organ transfers.
Analysts said it wasn't exactly clear why China had become more willing to air its dirty laundry, but they noted that the increased openness of Chinese society was making denial of the practice more difficult.
"At some point, the skeleton in the cupboard can't be ignored anymore," said Robin Munro, a Hong Kong-based human rights activist and author of a report on the issue.
China has faced a growing call for change from many lawyers and academics. It also has been embarrassed by a chorus of overseas criticism, including a sustained campaign by Falun Gong, a spiritual movement banned in China that Beijing condemns as an "evil cult."
In July, a report by Canadian human rights lawyer David Matas and former parliamentarian David Kilgour concluded that hearts, kidneys, livers and corneas had been taken from Falun Gong practitioners and sold for large sums. The movement claims its members are executed on trumped-up charges to supply the organ trade. Beijing has denied the accusations.
"Based on what we now know, we have come to the regrettable conclusion that the allegations are true," the report says.
China also acknowledged this week the widespread practice of transplanting organs to foreigners arriving on tourist visas, though the Communist Party's newspaper said Thursday that the nation forbade medical institutions "to lure foreign tourists" for the purpose. Many foreigners can afford to pay more and jump the long queue of those waiting for transplants.