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The astronauts spent 12 days in the Tiangong-1, where they conducted experiments and tests, and delivered a lecture to students on Earth about basic physics principles.

At the signing ceremony, U.S. Deputy Secretary of State William Burns said: "The six new EcoPartnerships we are committing to today are the best of the best. Some of you will be working on energy efficiency while others will be creating cutting-edge technologies to use landfill gas, conserve our groundwater resources and create plant-based plastic bottles. Whatever your project, I wish you the vest best in your work together."

Huachen Auctions is not the only player eyeing the vast potential of Western artwork, an area in which Chinese collectors are showing rising interest.

Dai Mei, a popular hotspot chain restaurant in Shanghai, which according to Jiefang Daily served fake mutton, denied on Sunday any wrongdoing.

Losses mainly occurred in Ya'an, a city with an economic weight of 1.67 percent in Sichuan and 0.07 percent of the national economy. The ecological sector, tourism and agricultural production are its major sources of incomes.