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Armed officers were present at least once a week in 43 percent of all public schools during the 2015-16 school year, compared with 31 percent of schools a decade before, according to data from a survey conducted by the National Center for Education Statistics.

Apple announced in June that its App Store had paid out billion to developers since 2008, of which 30 percent was made last year, according to Xinhua.

Around three years ago, she began forgetting her way home and even went missing several times, Wu said. Then things get worse. Wu's mother gradually started to forget her address, her own name and her children's names. At hospital, Wu's mother was diagnosed with Alzheimer's disease.

Applications can be made in the name of a team or an individual. Applications are possible both from within China and abroad. There is no limit to the number of participating teams. There should be no more than five signed authors for the designs submitted by each team.

As China and the US are having trade frictions and this may affect long-term bilateral trade, he said it is normal for foreign companies to export goods to China third parties.