ride-hailing       
 adjective [ before noun ] (also ridehailing) uk/ˈraɪd.heɪ.lɪŋ/ us/ˈraɪd.heɪ.lɪŋ/
 约车,叫车
used for or involved in the activity of asking for a car and driver to come immediately and take you somewhere
  Do you use a ride-hailing app? 你用约车APP吗? 
 The city announced new regulations on internet-based ride-hailing businesses. 本市公布了互联网约车业务的新规定。 
 - More examples
 - China officially recognized ridehailing apps as legal businesses.
 - the meteoric rise of ride-hailing services such as Uber and Lyft
 - He runs an internet ride-hailing company.
 
ride-hailing       
noun [ U ] (also ridehailing) uk/ˈraɪd.heɪ.lɪŋ/ us/ˈraɪd.heɪ.lɪŋ/
 约车,叫车
the activity of asking for a car and driver to come immediately and take you somewhere, or a service that lets you do this
  Smartphone ride-hailing has changed the face of public transport. 智能手机约车改变了公共交通的面貌。 
 - More examples
 - Ridehailing has been controversial, and criticized as lacking regulation.
 - People use their phones for everything from photography to ride-hailing.