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An augmented reality music show is held during the Light of the Internet Expo to enhance visitors' experience. [Photo/Xinhua]
An elephant roams freely at a wildlife sanctuary, south of capital Colombo, Sri Lanka. [Photo/VCG]
An employee oversees movement of aluminum rolls at a plant in Huaibei, Anhui province. [Photo/Xinhua]
An agreement by OPEC to cut production took effect May 1. That followed a price war between Saudi Arabia and Russia to gain market share that flooded the market with cheap oil and drove prices still lower.
An American citizen received green card from China in 2009. [Photo/IC]
