How many kilometers does Guangzhou Biological Island go around?

Guangzhou Biological Island is about **6.6 kilometers long * *. Guangzhou Biological Island, formerly known as Guanzhou Island, is located at the southeast end of Guangzhou City, Guangdong Province, along the Pearl River Development Zone. It covers an area of about 1.83 square kilometers, connecting Guangzhou University Town in the south, Pazhou International Convention and Exhibition Center in the north, cheung chau island in the east and Guangzhou Orchard Ecological Protection Zone in the west.