Welcome to your interview.
The question is on your right: Root Cause of Cancellation Spike. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
If ride cancellation rates spike by 15% in a specific zone at DiDi Chuxing, what metrics would you analyze to identify the root cause?