傈僳族
As the Qing pushed into Yunnan, the indigenous Lisu people were driven further west, eventually settling along the Salween in and around Nujiang Prefecture. Although China had been expanding into the area since Ming times, the greatest influx of settlers was around 1700 to 1850. At the same time, Tibet was expanding its influence into western Yunnan. Tibetan parties raided down the Salween valley and took slaves from the indigenous Nu and Derung populations, which were not well politically organized and unable to offer much resistance. On the other hand, the Lisu fiercely resisted efforts to take slaves and land.