If you need to carry out maintenance on your own Jincheng AX 125 then it is always recommended to have access to a Workshop Manual to keep just for personal reference should you need to know techniques to remove a specific part for example Brake Discs and match it again accurately.
Jincheng AX 125 Workshop Manuals are able to offer targeted diagnostic guidelines for the vehicle so if something is not working it helps you understand what the situation is and how you can resolve it. You will be able to decide if you can do this yourself or in the event the job is just too big you can book your AX 125 in with a suitable mechanic.
Jincheng AX 125 manual