Didi SMS only shows that the driver has arrived.

Generally speaking, drivers will pick up passengers at the departure point on time after receiving orders. There may be several reasons why the service cannot be completed:

First: In the past, the traffic jam was very serious on the way to pick up passengers, but I was afraid of delaying passengers' time, so I couldn't complete the service by contacting passengers.

Second: there is something urgent to deal with suddenly, such as sudden physical discomfort and so on.