Didi buys Uber's China business.
Didi is investing $600mn in Grab - the company that wants to kill Uber in SE Asia.
Didi is an investor in Ola, which is out there to kill Uber in India.
Uber now owns equity in Didi and subsequently in companies it is competing with. All these companies are willing to kill Uber (including Didi).
Too complicated ? Here is the TLDR version:
Who do you think will blink first?