Time needed for a day trip in Mt. Emei?

We planned to visit Leshan and Emeishan. Could you roughly tell us how much time do we need to spend in Leshan visiting the Giant Buddha and any interesting sites nearby?
And we are going to stay in Emeishan for the night. The next day we planned to visit all the places on Emei mountain until the Golden Summit...Could you tell me roughly how much time is needed at the Emei mountain? Thank you very much.
Chai