[Photo provided to China Daily]

According to Zheng, their main target customers for the parks are Hangzhou's residents and those from the Yangtze River Delta.

Most of their visitors are between the ages of 18 and 30, besides parents traveling with children.

To enhance the visitor experience, the parks have a free Wi-Fi network, free books and magazines, and portable battery chargers for mobile phones in the parks.

When visitors are in long queues during peak hours, staff dressed as clowns sing and dance for the visitors and distribute small gifts.

Every facility has staff equipped with emergency kits containing commonly used medicines.

"Safety is very important. And staff examine and maintain the facilities regularly. We also have an emergency drill every quarter," says Zheng.

When the parks are closed during the off season from December to February, the facilities are upgraded.