Leshan or Emeishan to Chongqing

I read here there’s intercity coach from Leshan to Chongqing city. Please advise how long is the trip and is it all the way freeway? Passing any rugged terrain or mountainous or tunnels.

We will be putting a night a Emeishan, is there any intercity coach from Emeishan to Chongqing? We are visiting Leshan G Buddha first before moving to Emeishan. Hence, if can take coach from Emeishan would be more ideal.Thank you