This source, an excerpt from a newsletter titled "Unknown! Keywords for Deeply Understanding Chinese IT," focuses on the significant impact of instant delivery services in China. It explains how these services, initially for food delivery, have expanded to encompass a wide range of goods, transforming the consumer experience from going to stores to having items delivered directly. The article discusses how this shift has fostered new retail models like new retail supermarkets, quick commerce, and community group buying, and highlights the supporting roles of smartphones, mobile payments, and advancing delivery technology like autonomous carts and drones in this evolving landscape.