The meanings below are for the individual characters. When they are paired together the meaning can change.
for each character from left to right:
Menghai tea factory
1) meng - I am guessing on this one because I could not find this character for meng.
2) hai = sea
3) cha = tea
4) chang = cliff can also mean factory
China
5)zhong = middle (middle kingdom aka china) this can stand alone for china
6) guo = country 5/6 together = china
Yunnan
7) yun = cloud
8 nan = south
Xishuangbanna
9) xi = west
10) shang = pair
11) ban = wooden piece
12) na = thread entering? not sure on this one

If anyone else wants to share perhaps collectively we can understand some of this mystery.
I found a really good book at the library - Learning Chinese Characters - Tuttle