Canton Fair shows China's trade runs on a brand-new model

Three weeks of deals, demos and dazzling new gadgets are wrapping up in China's Guangzhou. The 140th Canton Fair, officially the China Import and Export Fair, closes its doors on November 4. From robots and wearables to services and green tech, this year's fair shows Chinese trade is running on a band-new model, one moving toward higher-value products and more comprehensive services.