As for the interesting places, don't listen to their nonsense, they are all copied online, and the garbage inside is the worst. If possible, starting from Beidaihe, Nandaihe is also good. You can buy tickets at Yanshan University, which is cheaper and can give you some money left. And there are many tickets here to satisfy you. You can decide where to go according to these tickets, huh?
I hope the answer can fill your needs, hehe.