As the saying goes, one person's trash is another person's treasure. Today, on Xianyu, one of China's most popular online second-hand market platforms, what one person regrets buying can become another person's latest opportunity. This trend is evolving into a launchpad for the most unique and rapidly growing side hustles. What is fueling this craze?/ Handwritten notes take new form on tablets (20:03). On the show: Niu Honglin, Steve Hatherly & Laiming