A visitor looks at the painting "Mandela" created by Chinese artist Li Bin at Johannesburg University in Johannesburg, South Africa, on April 21, 2015. (Xinhua/Zhai Jianlan)
A boy plays at a fountain in the esplanade of the Monument to the Revolution, in Mexico City, capital of Mexico, on April 24, 2015. (Xinhua/Isaias Hernandez/NOTIMEX)Youssif, an 11-year-old actor, looks into the mirror at the locker room after a rod puppet show at the National Puppet Theater in Cairo, Egypt, on March 5, 2015. (Xinhua/Pan Chaoyue)A young pioneer reacts at a polling place during the municipal elections in Havana, capital of Cuba, April 19, 2015. (Xinhua/Liu Bin)Dancers perform during the closing ceremony of the Fifth Beijing International Film Festival in Beijing, capital of China, April 23, 2015. (Xinhua/Yin Gang)Bayern Munich’s players celebrate after their UEFA Champions League quarterfinal match against FC Porto in Munich, Germany, on April 21, 2015. Bayern Munich won 6-1 and advanced to the semifinals with 7-4 on aggregate. (Xinhua/Philippe Ruiz)Specimens of sea creatures are on display at the Shanghai Natural History Museum in east China’s Shanghai, April 17, 2015. (Xinhua/Chen Fei)A gorilla drinks cold beverage while resting under artificial water spray at the Dusit Zoo in Bangkok, Thailand, April 22, 2015. (Xinhua/Li Mangmang)Members of the Hungarian National Ballet perform “Swan Lake” during a dress rehearsal at the Hungarian State Opera House in Budapest, Hungary, on April 21, 2015. (Xinhua/Attila Volgyi)A visitor looks at the painting “Mandela” created by Chinese artist Li Bin at Johannesburg University in Johannesburg, South Africa, on April 21, 2015. (Xinhua/Zhai Jianlan)A man holds an audiobook at a bookstore in Mexico City, capital of Mexico, April 20, 2015. (Xinhua/Pedro Mera)