sentences:  It has an unusual zig-zag shape of about five segments, each about 12 km long and 1.5 to 3 km wide.It resembles a Chinese dragon with its head (at the north-west end) just in the open lake and its body and tail (south-east end) in the swamps.The shortest distance on land from nose to tail is 25 km, and it has about 100 km of shoreline.