八千米海岸七厘米蔚蓝十万里人海三千里茫然
[bā qiān mĭ hăi àn qī lí mĭ yù lán shí wàn lĭ rén hăi sān qiān lĭ máng rán]
A poetic phrase translating to 'Eight kilometers coastline seven centimeters blue sky; ten thousand miles sea of people three thousand miles confusion'. Using hyperbolic distances, this nickname evokes a poignant sense of vastness mixed with feelings of smallness and being overwhelmed by uncertainty.