Hi, and welcome to forum.
It would be nice if you first present yourself here: [Only registered and activated users can see links. ].
Then read carefully: [Only registered and activated users can see links. ], [Only registered and activated users can see links. ] and ESPECIALLY [Only registered and activated users can see links. ].

First of all - wrong section - moved.

Answers to your question:

Igo can not use Garmin maps.
You gave no info at all about your Chinese HU device (OS, ...), also about your "factory" HU.
Anyway, not possible to have Garmin truck version on your new HU.

First read [Only registered and activated users can see links. ].
Find program version for you, and then find maps here [Only registered and activated users can see links. ].