Train Ticket to Emeishan

Oh, the official website also shows that there is only one train schedule in that day. Kind of strange. I suggest you to wait for a few days to see if more trains will become available. Just keep an eye on this website, it is mostly consistent with the official web.

If not, you may need to go to downtown to take a coach to get there.

Thanks for your help, Robin!
Will do check again for the ticket.
But may I know if there is direct transportation from Airport to Xinnanmen Bus Station (I read online that this is the place I can catch the coach to Emeishan)

Yes, the long-distance buses to Emeishan depart from Xinnanmen.
From airport, you can take shuttle bus line 2 to get to East Tianfu Square Station. Then take a taxi to get to the bus station. The cab fare is CNY 10 to 20.