How much is the distance by train between Yichang & Wuhan? And how many hours it takes by the Expres

The distance is around 370 to 400km by rails.

If you take a bullet train (D/G-train), it takes around two hours and a half. If you take the express train (T-train), it takes around five to six hours in general. For the detail schedule and duration, you are suggested to look at the Train Section on this website.