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BEIJING, Jan. 1 (Xinhua) -- China's fourth national economic census entered its registration phase on the New Year's Day.

An information exchange meeting was held in Chiang Saen, Thailand.

Current regulations in China and elsewhere require that man-made and natural diamonds are clearly labeled so that consumers know what they are buying.

Thanks to the project, over 53 million residents in central China's Henan Province, northern China's Hebei Province, Beijing and Tianjin have bid farewell to unsafe drinking water.

It is estimated that the annual travel rush that lasts 40 days will see 413 million railway trips across the country, up 8.3 percent from the previous year.