Kingdom of Khotan
The Sumpa/Supi are associated with the Supiya of Kharosthi documents of about 300 CE from the Tarim Basin. They are described as being among the invaders of the Kingdom of Khotan ('the red-faced (Tibetans), Huns, Chinese, Supiya'). To the Khotanese, who had been a settled people for about a thousand years, they appeared as savage and uncouth. They are also mentioned as having been in Niya and Cherchen.