I don't know if there is a bus from Yuhuan to or through Changyu, but there must be a bus from Yuhuan to Wenling New Station, and then you can transfer to Wenling to Changyu at the new station to Zhangyudong Day. As far as I am concerned, the day from Wenling to Zhangyudong is very close, only about 20 minutes' drive. The conductor will tell you when you get there. But getting off doesn't mean getting to the scenic spot, because the scenic spot is in the mountains. But don't worry, there will be many taxi drivers shuttling between the scenic spot and the drop-off point, and they will drive you directly to the foot of the mountain.

For the bus from Yuhuan to Dongyu Dong Tian, I suggest you call Yuhuan local 1 14 to check the telephone number of the automobile operation department, and then ask if there are any flights.