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The minister said the lag of research on national food standards and the country's fledgling risk evaluation system hindered the mapping of national food standards.

GUANGZHOU, March 18 (Xinhua) -- Authorities in south China's Guangdong Province said Sunday they were working to clean oil slicks on a river which might threaten drinking water supply to a four-million-people city.

The injured were rushed to hospital for treatment, and it was unknown yet whether their injuries were life-threatening or not, he said.

Trade between China and the United States has a solid development base. China's trade with the United States, the country's second largest trade partner, rose to 446.7 billion U.S. dollars in 2011, a 15.9-percent growth over 2010 and a sharp increase from the 80.5 billion ten years ago.

The press release said the SCO is concerned with the situation in Afghanistan, as it is closely related to regional peace and stability. All sides support the United Nations in playing a leading role to find a solution to the violence there, as well as support the efforts of the Afghan people to peacefully reconstruct their country.