Why is there no detailed map of Chongqing on Google Earth?

I have already heard more than one friend's question: why there is no detailed map of Chongqing on Google Earth?

This is indeed an interesting thing. After several major map data updates, Google Earth has provided very clear maps for most of the large and medium-sized cities in our country. However, the map of Chongqing has never been updated. What's more puzzling is that Chongqing on Google Earth has not even been separated from the map of Sichuan Province. That is to say, up to now, Google still stubbornly thinks that Chongqing is still a city under the jurisdiction of Sichuan Province.