Tsomo, 26, is the only staff for the post office at the foot of the world's highest peak Qomolangma, also known as Mount Everest, in southwest China's Tibet Autonomous Region.

Located more than 5,200 meters above sea level, the 20-square-meter post office was established in 1998 at the base of Mount Qomolangma in Zhaxizom Township in Tingri County. It is known among global tourists as the highest post office in the world.

The Tibetan girl has been working at the office since she graduated from a vocational school in the city of Shigatse in 2011, with a monthly salary of about 1,000 U.S. dollars.

In many people's eyes, Tsomo's job is easy and boring: every workday, she needs to postmark thousands of postcards and souvenir picture albums which display spectacular views of Mount Qomolangma in different seasons.

At the post office, a postcard has two postmarks: a red mark printed with the word Qomolangma both in Chinese and Tibetan, and a black mark indicating the date and address of the post office.

During the peak travel season from April to October, Tsomo needs to postmark more than 3,000 cards every day from 9 a.m. to 9 p.m. She sometimes needs to write blessings on postcards in Tibetan for both domestic and overseas visitors.