Didi is now backing Uber’s fiercest rival in Southeast Asia
qz.com
qz.com
Another aspect that I haven't seen discussed a whole lot yet in relation to Didi's purchase of Uber:
Didi's $1B investment in Uber gives Didi an economic interest in Uber, but perhaps most importantly it probably gives Didi investor information rights. This is a big deal when it comes to navigating the waters to compete with Uber directly or indirectly in markets outside China. Uber may also have information rights on Didi, but those may only be shareholder (eg common) rights vs investor information rights since Uber China's acquisition was a merger rather than a cash investment.
In any case, I don't think people are giving Didi enough credit for how savvy and strategic they were here. Uber seems to have been outplayed on every level by Didi when they faced off. It will be very interesting to see what happens over the coming years.