United Nations Environment Programme (UNEP) Executive Director Achim Steiner (L) and Chinese actress Li Bingbing attend a press conference at the UNEP headquarters in Nairobi, capital of Kenya, May 6, 2013. As an UNEP Goodwill Ambassador, Li Bingbing urged greater effort to combat illegal wildlife trade here on Monday. Li will travel to the Samburu National Reserve in northern Kenya this week, where she will meet wildlife experts and visit sites where elephants have recently been killed by poachers.[Photo/Xinhua]