Baidu map, Gaode map, wide stool technology, how did their high-precision maps come from?

I once read an article analyzing these platforms, and the technology of wide stools is quite powerful! It is said that it is the first company in China that completely focuses on crowdsourcing mode to collect high-precision maps. The high-precision map it collects is a brand-new map processing technology based on artificial intelligence, that is, its data can be produced and updated quickly. Baidu should cooperate with NavInfo, not its own data. Gao De collects data himself to make high-precision maps.