WHAT'S THE FASTEST WAY TO TRAVEL FROM SHANGHAI TO THE MAIN DAM WALL, APPROX COST & TIME IT TAKES PLS

The dam is in Yichang, Hubei Province and the fastest way to reach there is to fly to that city and then take local buses to rawch the wall.
The plane takes about two hours. The ticket fare is a little hard to tell, it is suggested to search on https://www.travelchinaguide.com/china-flights/ for detail information.