Rumours that powdered rhino horn can cure cancer and other diseases have fuelled a huge and growing demand for it in countries like Vietnam.
This illegal trade is threatening the very existence of one of the world's great animals.
ITV News China Correspondent Angus Walker went undercover to expose a trade that is causing the rhino to be hunted by poachers to the brink of extinction:
The UK is leading calls for Vietnam and China to stem the roaring demand for ivory that is driving the rise in poaching in Africa.
If the demand for rhino horns in Vietnam continues at the current rate it could threaten to wipe out this majestic animal.