The first question depends on which seaside you are going to. The nearest one that doesn't need a car is the trestle. When you get out of the railway station and cross the underground passage, you can see the sea. If you go to May 4th Square, you can take bus No.25, both of which are signs of Qingdao. ...
Secondly, seaside attractions don't need tickets. I saw a friend say there was an underwater world. Actually, I recommend Polar Ocean World, which is better. Tickets 120. There are six tickets for Huashi Mountain Villa (former residence of Chiang Kai-shek) at Badaguan, and nothing else. There is really no need to go to Huilan Pavilion on the trestle.
Third, the seaside scenic spot is a deceptive scenic spot. I, a Qingdao native, said the same thing. You buy everything for free. As for the delicious food there, the chicken rack ... but you can't find the most authentic one. As a friend said below, I suggest you stay in Taitung and get something to eat. It is the most affordable place, maybe not very advanced, but it is our students' favorite. ...