The Speedy Anaconda at Shanghai Happy Valley. [Photo provided to China Daily]

Nearly 40 percent of guests who've visited a Happy Valley have returned, the company claims.

Yuan says the trip helped him and his friends harness their inner child.

"We couldn't play like that anywhere else, since we're adults," he says.

"It was a great break from work. I'll come back soon."

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About this series

China Daily explores summer destinations and activities throughout the season