Group 1 - The core idea of the articles revolves around the transformation of public transportation systems in various cities, focusing on the shift from traditional large buses to smaller, more flexible models to better meet urban mobility needs [1][2] - Beijing has implemented 19 "short, frequent, and fast" bus routes with intervals reduced to under 5 minutes, achieving an average daily passenger volume of 51,000, effectively connecting over 10 subway lines and 31 residential communities [1] - Chengdu has introduced a "food special line" with bus stops set every 300 meters, integrating into a 15-minute living circle, demonstrating the inadequacy of linear transportation models in modern urban networks [1] Group 2 - The transition from large to small buses signifies a deeper change in service logic, with Zhejiang Lishui's "dynamic micro-bus" breaking fixed routes and offering point-to-point service through mobile app orders [1] - The article warns against three major pitfalls in the "thinning" of bus services: lowering service standards, neglecting the needs of remote and elderly communities, and compromising safety and accessibility features [2] - The success of this transformation requires enhanced operational capabilities, system integration with other transport modes, and maintaining public service commitments, particularly for vulnerable populations [2]