Taiwan High Speed Railway Chiayi Station exit 2 [@ 2 pm]→Bus Rapid Transit→Chiayi Railway Station (25 minutes)→take a Taiwan Tourist Bus or public bus to Alishan [Buy tickets on the spot]
But we don’t know what’s the frequency of BRT bus from HSR to TRA at Chiyayi? Can anyone help? Thanks.
But it’s not clear if we can buy tickets in advance or not. On this page they say there is 50% discount on e-tickets https://www.taiwantrip.com.tw/news/726
If you exit the HSR station at 2pm you will not be able to catch that bus, because the last service is at 1:10pm. So you still have to take a bus to the downtown railway station.
What they mean by e-ticket is a card like EasyCard or iPass (not cash). You can swipe the card when boarding the bus, no need to buy in advance. But note that if you go during the holiday period (April 3~8) there will probably a LOT of people…