Chengdu Airport to Emeishan flight arrives 6:30 25 April. Return emeishan to chengdu 30 April 15:00

We are not able to find any trains to our destinations. The internet says "not available"--does this mean that the train times are not posted yet? are additional cars being added to the train schedules?
If there is no train, how can a traveler get a taxi for that long journey booked in advance?