SINAReportsFirstQuarter2019UnauditedFinancialResultsBEIJING,May23,2019/PRNewswire/--SINACorporation(theCompanyorSINA)(NASDAQ:SINA),aleadingonlinemediacompanyservingChinaandtheglobalChinesecommunities,todayannounceditsunauditedfinancialresultsforthefirstquarterendedMarch31,2019.FirstQuarter2019Highli