Surveyor tells of high-risk career

He worked in harsh conditions that included extremely low temperatures and food shortages

Shao Shikun, 80, a surveyor assigned 40 years ago to help determine the height of Qomolangma, the world's highest mountain, saw many colleagues die during the arduous work.

Despite these harrowing incidents, he never wavered in his belief in the work's importance, saying, "Having experienced unimaginable hardship, I am so proud of this job."