撤并镇街，经济第一大省，突然开始了

Group 1 - The article discusses the recent trend of town and street mergers in Guangdong, aiming to reduce administrative levels, save costs, and enhance administrative efficiency [4][10][15] - Guangdong, as the most populous province, is experiencing population changes that necessitate these adjustments, moving from a growth-focused expansion to a more sustainable management approach [12][14][22] - The merging of towns and streets is seen as a way to optimize regional resources and improve spatial layout, reflecting a shift in administrative strategy [15][19][20] Group 2 - The article highlights that while Guangdong is experiencing population inflow, other regions, particularly in the Northeast and Midwest, are facing population decline and may soon follow suit in administrative adjustments [22][28][34] - Historical context is provided, noting that past administrative changes were driven by rapid growth, whereas current changes are a response to population stability and decline [10][38] - The article emphasizes the importance of aligning administrative structures with population trends to ensure efficient governance and resource allocation [24][25][26]