definition of return on investment

{"cid":"91223434","title":"Biocompatible Assurance Pre Milled Abutment High Return Grade 5","imgUrl":"https:\/\/img.chinax.com\/nimg\/01\/48\/3c15afe27c06d89ea8e711af1ab4-200x200-1.jpg","attrs":{"Price":"To be negotiable","Brand Name":"Beaming","Model Number":"10mm\uff0c14mm","Minimum Order Quantity":"1","Delivery Time":"7-15 days","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"1 pcs 7-15 days","Packaging Details":"Wooden crate","Material":"Titanium","Diameter":"10.00mm\/14.0 mm","Connection":"Engaging","Compatible systems":"Nobel,ITI,Biodenta,osstem,Dentium,DIO,B&B,Megagen,Adin,Neobiotech"}}

{"cid":"91223123","title":"Dual Revenue from Charging Stations with Advertising Screens: One-Stop Profit Solution","imgUrl":"https:\/\/img.chinax.com\/nimg\/c2\/ba\/c4aa92f70d692e5bff4ea39ad640-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"Mckee Charging","Model Number":"CLF-FDC 160KW","Minimum Order Quantity":"1","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union","Packaging Details":"Wooden case packaging","Certification":"CE","Place of Origin":"Luoyang, China"}}