China is the world's leading executioner. Organs of the executed are harvested (after execution but before death) and sold on the world markets.
2012 Beijing Lawyer Denounces Execution for Organs at Hospital
2012/07/07 China: death-row inmates main source of organs
Japanese Broker seeks illegal acquisition of organs in China
China detains Japanese man over organ brokerage
China may have executed nearly 8,000 inmates in 2006: Amnesty
Death sentence finalized for Japanese drug smuggler in China