The Nam Pang River is a major river of Shan State

Shan State

Shan State is a state of Burma . Shan State borders China to the north, Laos to the east, and Thailand to the south, and five administrative divisions of Burma in the west. Largest of the 14 administrative divisions by land area, Shan State covers 155,800 km², almost a quarter of the total...

, eastern Burma. The largest tributary of the Salween River

Salween River

The Salween is a river, about long, that flows from the Tibetan Plateau into the Andaman Sea in Southeast Asia. It drains a narrow and mountainous watershed of that extends into the countries China, Burma and Thailand. Steep canyon walls line the swift, powerful and undammed Salween, one of the...

, it has its source in the hills somewhere northeast of Pangkyehtu. It joins the Salween at the village of Ta-hsopteng

Ta-hsopteng

Ta-hsopteng or Tahsopteng is a river village on the Salween River in Langhko Township, Langhko District, in the Shan State of eastern Burma. It lies on the confluence of the Salween and the Nam Pang River...

 in Langhko District at 19°51′47"N 97°45′4"E. A few miles beyond the confluence is said to be "a strange whirlpool, at the place the river is in a gorge between limestone cliffs, which fall smooth and precipitous to the water's edge."