Use of Beijing Transportation Card for Parks Annual Tickets

How does the annual ticket works? The RMB 200 for annual tickets is for one year unlimited entry to one park only or to all the parks indicated. That is
Summer Palace, Temple of Heaven, Zhongshan Park, Beihai Park, Jingshan Park, Taoranting Park, Zoo, Fragrant Hills Park, Botanical Garden, Yuyuantan Park, Grand View Garden, Lianhuachi Park, Temple of the Moon, Temple of Earth, Water Cube, Fengtai Park, Wanfangting Park, International Sculpture Park and Shuangxiu Park.