diān zàng chuān
Yunnan, Tibet and Sichuan
滇
diān
abbr. for Yunnan Province 雲南|云南[Yun2 nan2] in southwest China
藏
zàng
abbr. for Xizang or Tibet Autonomous Region 西藏[Xi1 zang4]
川
chuān
abbr. for Sichuan Province 四川[Si4 chuan1] in southwest China