1.You can climb the mountain twice by single ticket.

I haven't this information before. but it's true. on the eve of my climbing, I met the uropean(hungarian) young couple, They were going to climb second time from different direction. soon after I start to climb, one downing visitor told me the twice entering thing. then I got to the entrance, I deliberately asked the service person. their answer was, You can enter twice within 3 days period! it's a useful information for some energetic friends, or share the ticket with else one under necessary planning.