U.S. stocks tick down as Apple drags tech sector lowerChina AI industry to see scale reach over $240 blnDemand from China drives U.S.' soybean tradeStudy links pesticide to breathing problems in children living near farmsXi Focus: Xi Calls for Promoting Peace, Solidarity, Inclusiveness Through SportsRailway logistics centers completeBoeing committed to forging closer partnership with China for common developmentUC Berkeley to host conference on geneYearender: Silicon Valley keeps trends as Artificial Intelligence goes mainstream in 2017China discovers new oilfield with over 100 mln tones of reserves