Didi acquired Kuaidi some time ago. Changed the name to Didi Kuaidi. Name changed again a little while ago to Didi Chuxing.
To me, this deal is about "You can sell XXX, if you do YYY" YYY may be investment, technology transfer, many things. But a lot of China deals and inward investment in R&D, Operations or Technology are in fact driven by sales. "We need to sell this, and in order to do so, we've been told we also need to YYY."