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2 hours is enough for Shanghai Ocean Aquarium... I have been there 5 times... The fastest is half an hour...
If you want to touch a baby shark... It depends on the number of tourists that day...
Changfeng World takes longer... because the park is more great... half a day is enough...
< p>The show at the Beluga Pavilion is always good... it is recommended to come in and sit down.