 In addition, a portion of the Anning River valley and Mianmian Mountains near Lugu Lake support the subalpine conifer forests.This region covers northern Yunnan Province, western Sichuan Province, and the extreme eastern edge of the Tibet Autonomous Region.The Hengduan Mountains subalpine conifer forests are one zone in a range of montane ecosystems that transition between tropical and temperate ecoregions along the southeastern fringe of the Tibetan Plateau.