About 1.2 meters or so, they usually don’t need it; not that strict; very cheap, only RMB13 per person as an adult.

Woodland Heaven Lake offers free admission to children under 6 years old or less than 1.2 meters tall, and half-price tickets for children above 6 years old up to 18 years old.
About 1.2 meters tall, generally doesn’t need to be that strict, very affordable, and costs only 13 yuan per person for adults

Woodland Heaven Pond offers free admission to children under 6 years old or below 1.2 meters in height, and half-price tickets for children between the ages of 6 and 18.