Sammy Lin is wrapping thread around his fingers in a little alleyway shop in suburban Taipei. It looks like he’s getting ready to play cat’s cradle. But when he leans in close and begins maneuvering the string across a customer’s face, it’s clear that this is no game. It’s a traditional form of cosmetology. In today’s Ear to the Ground: a closer look at what’s known as wanmian or “threading.”