I'll be honest. I took an overnight train from Beijing to Qinhuangdao with a Tinder date. He wanted to watch the sunrise. We took a 10:30 train (all the seats were fully booked and we had to buy standing tickets), got there at 1:30am, he bargained with a cab driver to take us to the Wall. We got dropped off at the beach, napped until sunrise, paid the fee to get on the Wall, marveled, and took the train back to Beijing.