Authored by Eva Fu via The Epoch Times (emphasis ours),

Stepping into the van guarded by armed soldiers with five surgeons and nurses, Zheng Zhi didn't know he was entering into a world that would haunt him for the next quarter of a century.

Dr. Zheng, then a resident doctor at one of China's largest military hospitals, knew little more than they were on a "secret military mission" near a military prison located around the northeastern Chinese city of Dalian.

A light blue fabric covered the four sides of the vehicle, shielding it from any curious glances.

When the door opened, four burly soldiers carried in a man whose limbs were bound with thin ropes that had cut deeply into his flesh. The man was no more than 18 years old; his organs, the surgical crew had been told the day before, were "healthy, fresh."