Story highlights
China looks to Africa to supply donkeys for traditional medicine
Suppliers suffering environmental and economic problems
The largest economies and black market now involved
(CNN)Gelatin produced from donkey hide is a key ingredient of one of China's favorite traditional remedies, known as ejiao, which is used to treat a range of ailments from colds to insomnia.

But as the rising power shifts towards advanced industry and away from traditional agriculture, donkeys are in decline. State statistics show the population has fallen from 11 million to six million over the last 20 years.
http://edition.cnn.com/2016/09/29/africa/china-african-donkeys/