“Several years ago mention was made of Chinese death ambulances, traveling execution vans. The unmarked vehicle arrives at the site where police load the condemned into the back of the van, where they are tied to a gurney.” . . . &c.
It is called Jinguan Auto http://www.dailymail.co.uk/news/worldnews/article-1165416/Chinas-hi-tech-death-van-criminals-executed-organs-sold-black-market.html