Core Viewpoint - The article highlights the unique selling sounds and food culture in Bijie City, showcasing the local delicacies and the nostalgia associated with traditional street vendors [1][2][3][4]. Group 1: Local Food Culture - The selling sounds in Bijie City, such as "酸汤苞（嗷）饭" and "麻辣卤豆腐卤鸡蛋," are integral to the local identity and evoke a sense of nostalgia among residents [1]. - Traditional foods like "炒米糖" and "蜂窝煤" reflect the local culinary heritage, with vendors using distinctive sounds to attract customers [2][3]. - The preparation and selling of "炒米糖" and "开水" illustrate the craftsmanship and cultural significance of these local delicacies [3][4]. Group 2: Evolution of Street Vendors - The article notes the transition of street vendors from using manual carts to more modern transportation methods, indicating a shift towards more efficient and eco-friendly practices [2]. - Despite the introduction of modern food options like ice cream and coffee, traditional vendors continue to hold a place in the community, maintaining their unique selling sounds and methods [3][4].