Kailide 3D map is suitable for urban roads, with less update frequency and good signal. If you deviate from the route, you can't automatically find a new route. Gaode 3D map is suitable for rural roads and urban roads, with higher update frequency, good signal and sensitive response. If you deviate from the route, you can automatically find a new route. Daotong 2.0 map is suitable for rural roads, while urban roads are slightly inferior and the signal is poor. If you deviate from the track, you will be unable to respond for a long time, and you will be rigid and disoriented. I have used all three versions of the map, and I prefer Gaud's map.