If you need to execute fixes to your Veli ZQ 90 then it will always be a good idea to own a Workshop Manual for a guide if you want to know techniques to remove a certain component like the Drive Shaft and fit it again the right way.
Veli ZQ 90 Workshop Manuals provide you with identifiable diagnostic info with regards to your vehicle therefore if something is playing up it will help you understand what the issue is and how you can repair it. Then you are able to determine if this can be achieved on your own or if the job is too big you can still make a reservation for your ZQ 90 in with a suitable car garage.
Veli ZQ 90 manual