My Chinese friend in Beijing once read an article about why Didi was winning. She told me that the article missed one of the most important things in her opinion. With Didi, she can get a fapiao receipt, which she can then give to her company to claim expenses. She can't get a fapiao receipt with Uber. That's why she never takes Uber. I don't know how big of an effect this actually has, it's just an interesting anecdote.