If you have to perform maintenance on your own Jinlun JL QT 50 4 then it will always be a good plan to own a Workshop Manual to use as personal reference in case that you want to know the way to take off a certain component including Drive Shaft and install it again the right way.
Jinlun JL QT 50 4 Workshop Manuals offer you special diagnostic information on your vehicle therefore if something is playing up it helps you understand what the issue is and some ways to make it better. You can then decide if you can do this on your own or if the job is just too big you can actually book your JL QT 50 4 into a decent friendly mechanic.
Jinlun JL QT 50 4 manual