Core Viewpoint - The introduction of a QR code for tipping at Haidilao could undermine its core service model, leading to consumer distrust and a potential decline in service quality [3][4][46]. Group 1: Haidilao's Service Model - Haidilao's core competitive advantage lies in its service, which is supported by its pricing strategy [7][8]. - Consumer perception of service quality is crucial, and any differentiation in treatment can lead to dissatisfaction [10][12]. Group 2: Impact of Tipping - The introduction of tipping can lead to questions about the motives behind service quality, potentially causing consumer anger [24][35]. - When tipping is involved, consumers may feel that service quality is contingent on whether they tip, which alters their expectations [31][38]. Group 3: Consumer Expectations - With the introduction of tipping, consumer expectations shift, and they may begin to compare Haidilao's service to that of high-end restaurants [39][40]. - The visibility of tipping through a QR code can create a perception of unfairness, leading to a trust crisis between consumers and service staff [46][47].