dà méi gōng hé cì qū yù hé zuò
Greater Mekong Subregion (GMS), economic cooperation program between China and Vietnam
大
dà
big; large; great
湄
méi
(literary) shore; coast; bank
公
gōng
public
河
hé
river (CL:條|条[tiao2],道[dao4])
次
cì
next in sequence
区
qū
area
域
yù
field
合
variant of 合[he2]
作
zuò
to do; to engage in
