The EIA said they were offered the wine, an alcoholic "health tonic", at the privately-owned Qinhuangdao Wild Animal Park, in Hebei province.
The trade in parts of the endangered species has been subject to an international ban since 1987, and has been outlawed in China since 1989. But despite global conservation efforts, tiger numbers continue to decline.
During last year’s high-level summit of the global Convention on the International Trade in Endangered Species, the Chinese delegation raised the possibility of ending its domestic ban in order to allow the use of farmed tiger parts.
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