China white

China white is #4 heroin, nowadays it can mean heroin "cut" with fentanyl or furylfentanyl but it should mean the purest heroin one is able to obtain, white in colour.
so strong every dose must be weighed and to be real heroin free of fentanyl or other opiates than diamorphine.

"I was junk sick and the china white is so strong it made me feel well again for 12+ hours and I felt awesome"