Mansa Mountain (Yiwu Mountain)
Mansa is different from Yiwu, about 20km further north
I cut a small part from the leaf's site:
"Xishuangbanna Yiwu tea growing area
The Yiwu tea growing area is located in the Yiwu Township of Mengla County. The greater Yiwu region encompasses the four townships of Mansa, Mahei, Yitian and Manluo. In ancient times, local ethnic Bulang people were the primary growers of tea."
I think if I remember correctly, the Mansa is the older region and than it grew to include other areas as the mansa region stoped producing so much.