[tomtang0514]

When I was in China early this year, they use baidu map on my iphone version. It looks like there was a partnership between baidu and uber back then. There's even a "get Uber" feature build inside Baidu Map app back then.

[tluyben2]

It uses Baidu for sure and has been for at least 1.5 years.

Edit: looked up the first time I used Uber in Shanghai.