nǎi duī lā shān kǒu
Nathu La (Himalayan pass on the Silk Road between Tibet and the northeastern Indian state of Sikkim)
乃
nǎi
variant of 乃[nai3]
堆
duī
to pile up
拉
lā
to pull
山
shān
mountain; hill (CL:座[zuo4])
口
kǒu
mouth
