https://techcrunch.com/2018/05/14/didi-chuxing-can-now-test-self-driving-cars-in-california/ >Quite a number of companies — 53, to be exact — have received permits to test self-driving cars with a safety driver in California. One of the more notable companies that has received a permit is China-based Didi Chuxing, which officially opened up its U.S.-based research lab last March. >Also on the list of permit holders is Udacity, which partnered with Didi last year to host a contest for the development of an Automated Safety and Awareness Processing Stack.