最具争议的“一线城市”：一边被说在衰落，一边又被很多人看好？

Group 1 - The article highlights the significance of China's "first-tier cities," specifically mentioning Beijing, Shanghai, Shenzhen, and Guangzhou as key urban centers that symbolize the country's progress and development [1] - Beijing is characterized as the political and cultural center, providing direction and guidance [1] - Shanghai is described as an international metropolis that connects China to the world through its prosperity [1] - Shenzhen is noted for its innovative spirit, which has led to rapid advancements and a remarkable growth story [1] - Guangzhou is recognized for its historical significance as a "thousand-year commercial capital," showcasing a sense of composure and inclusiveness within the first-tier cities [1]