Lanchang

Lanchang (澜沧) refers to several entities, most notably:

• Lanchang River: The Chinese section of the Mekong River. Originating in the Tibetan Plateau, it flows through Yunnan province and then becomes the Mekong River as it enters Southeast Asia. The name "Lanchang" is primarily used when discussing the river within the context of China.

• Lanchang Lahu Autonomous County: An autonomous county located in Pu'er City, Yunnan Province, China. It is named after the Lahu ethnic group, who form a significant portion of the county's population. The county is known for its tea production and diverse ethnic cultures.

The term "Lanchang" is thus primarily associated with geography and ethnicity in Yunnan Province, China. References to "Lanchang" usually relate to either the river itself or the autonomous county located within its watershed.