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     On August 5, the Rio tinto 2011 mid-year conference was held at the company's headquarters.At the meeting, representatives of all departments made a brief summary of the main work in the first half of 2011.After the meeting, all the staff of soto headquarters and the factory went to anji, a bamboo town in China, for a two-day cool trip.During the trip, we also held a photography contest to increase the staff's hobbies.