Almost never is it the starter motor. assuming you've done due diligence and checked the battery has charge (should be under the floorboards) - do not skip checking this! besides being likeliest cause, the batteries that come from Geely are craaaaaappppy... you can fight with them fro replacements and maybe get a free new battery but it's gonna also be crappy. much better is to just get a decent new battery. again though only if it's got no charge.
Next most likely is the starter relay. check out wiring diagrams, locate the starter relay (follow the heavy gauge wires lined back from the starter motor)
you can check if that's failed by jumper across the heavy wires CAREFULLY
finally, what you've got is a Chinese scooter, specifically a 139QMB motor, commonl called GY6 50. that'll get you whatever parts you need on ebay. gy650 starter? relay? easy.