Working alone at the world's highest post office is not so hard for Tsomo. After work, she often spends hours reading books, watching TV programs or video chatting with her family who lives in downtown Tingri.

"I am not lonely. I go back home twice a month and my parents and four siblings often come to see me," said Tsomo.

Tsomo has also made friends with the local people who run the tea houses or lodges at the base camp. "We often talk about the latest happenings with each other when we are not busy," said Tsomo. "They often prepare meals for me when I am busy, which I really appreciate."

The job also brings happy surprises to Tsomo who has received many postcards or letters from tourists. "I have made friends with some of the visitors. After they return home, they will share their travels with me by mailing me letters or postcards," Tsomo smiled when speaking of her friends far away.