IN VIDEO: The 60,000 km path to discovery

<p>China's highways were once built for function alone. But a new 60,000-kilometer national plan is now tailoring routes specifically for road trips, threading together the Great Wall, the Yellow and Yangtze rivers, and dozens of World Heritage sites into one immersive network. Rest stops are becoming cultural outposts, and overlooks invite quiet reflection, turning the journey into something far more than just a way to get somewhere. / In a relationship, we used to know what crossed the line. Now it is a hidden text, a dating app you are still on, or a friend your partner has never heard of. A new survey of 2,000 people reveals just how blurry the boundaries have become (38:21). On the show: Steve, Yushan & Yangyang</p>