https://www.reuters.com/article/china-regulation-ride-hailing/chinese-regulators-raise-concerns-with-ride-hailing-firms-idUSKBN2FY07U >BEIJING (Reuters) -Chinese regulators summoned 11 ride-hailing firms including Didi Global Inc, Geely's Caocao and Meituan's ride-hailing unit to a meeting, the transport ministry said on Thursday, to discuss points of concern in the sector.