The back-to-school season has long meant overpriced uniforms and endless waiting, but Shenzhen offers a different model. Parents buy standard school shirts at corner stores, supermarkets, or through delivery apps for the price of a meal. The city set a unified design and let the market handle the rest. So how did Shenzhen pull this off, and what are the criticisms? On the show: Steve, Fei Fei & Yushan