请翻译：remains in a class by itself

请翻译：remains in a class by itself
One after another, the big cities of the interior have eagerly entered the race to urbanize, with many openly brandishing the objective of becoming a “world city” within a few years. But whether judged by its size, its ambition or the scale of transformation, Chongqing, with its 12 million people, remains in a class by itself.

保持其自有风格

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