Someone told me create a map folder in root directory, then copy and rename the unlocked map in it with XX.img (not the name gmapsupp.img). After that, update the device with webupdater. It works! Thank you all very much.
By the way, before that, gmapsupp.img in system folder worked well. But now, only the map folder works. Does anyone know why for my problem? And why the new "map" folder works?
Special thinks to lolypop000 and catymag: Thank you very much for your kind helps.