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China's investment in environmental protection surged by an average annual rate of 31.4 percent during the period, with investment in new energy including solar, wind and nuclear power up 13.8 percent annually on average.

China's economy continued steady expansion in the first half of this year with GDP up 6.9 percent year on year to about 38.2 trillion yuan (.6 trillion), according to the National Bureau of Statistics (NBS).

China's economy may grow slightly slower in the second half of the year but will remain robust supported by improved external demand and domestic private investment, a leading economist at Morgan Stanley said on Monday.

China's largest and most advanced solar-powered unmanned aircraft has set a domestic record for flight ceiling by reaching an altitude of over 20,000 meters, according to its designer.

China's donkey population dropped to around 2.53 million last year from 11.8 million in 1952, official data showed.