U.S. stocks tick down as Apple drags tech sector lowerAirbus to set up innovation center in ChinaChina renews blue alerts for severe convection weather, sandstormsPioneering zone to be launched in Hunan to propel Sino4th CICPE scheduled from April 13China's 5G phone shipments top 167 mln in 2020: reportChina's research vessel finishes monthByteDance's platform takes on U.S. eChina's auto export ranks first globallyU.S. stocks post weekly gains amid tax bill, data