Chinese Dian Chi or Tien Ch'ih
Lake, central Yunnan province, southern China.
It is about 25 mi (40 km) long and 8 mi (13 km) wide. The area was settled by sedentary agricultural peoples as early as the 2nd century BC. It was the centre of the independent state of Dian (Tien), which became tributary to the Han dynasty after 109 BC.