If you wish to undertake fixes for your Dfang DF125 21 then it is always recommended to have access to a Workshop Manual to keep just for personal reference should you want to know techniques to strip off a certain component for example, the Exhaust and install it again safely.
Dfang DF125 21 Workshop Manuals will give specified diagnostic details with regards to your car so if something is playing up it will help you figure out what the situation is and methods to resolve it. You can then analyse if this can be done by yourself or if ever the job is too big you can actually make a booking for your DF125 21 right into a local repair garage.
Dfang DF125 21 manual