What do you mean the city of lights is unlocked?

This means that you have been to this city.

Lighting up the city is actually an interactive function on the mobile phone map. People will use maps to query some roads and information of cities in their daily travel. And people will get used to sorting out, summarizing and reviewing during or after traveling. Lighting the map is a good function, which can record the cities you have passed and see your own steps. Now there is a place in the navigation system where you can light up the surrounding areas of your area on the map, and you can also light up every place you pass when you go out to play and drive.