直辖市的官方人口有3000万，如果重庆是单一城市的话，它就是世界上最大的城市之一了。
The municipality's official population is more than 30m, which if it were a single city would make it one of the largest in the world.
直辖市的官方人口有3000万，如果重庆是单一城市的话，它就是世界上最大的城市之一了。
The municipality's official population is more than 30m, which if it were a single city would make it one of the largest in the world.
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