Young people in China have set off a nascent counterculture movement that involves lying down and doing as little as possible. Five years ago, Luo Huazhong discovered that he enjoyed doing nothing. He quit his job as a factory worker in China, biked 1,300 miles from Sichuan Province to Tibet and decided he could get by on odd jobs and $60 a month from his savings. He called his new lifestyle “lying flat.” “I have been chilling,” Mr. Luo, 31, wrote in a blog post in April, describing his way of life. “I don’t feel like there’s anything wrong.” He...