Tourists queue in line outside the Submarine Adventure Hall, which sits in the sightseeing tunnel from Pudong to the Bund in Shanghai on April 14, 2015. (Photo/xinmin.cn)
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Tourists queue in line outside the Submarine Adventure Hall, which sits in the sightseeing tunnel from Pudong to the Bund in Shanghai on April 14, 2015. (Photo/xinmin.cn)