"There are various stones like Gobi Jade and mudstones scattering on the desert," said Yang, "Gradually I loved to collect them."

One day, a picture of a black stone drew her attention. When she learned how difficult it was for a meteorite to pass through the atmosphere and fall on the earth, she got totally obsessed with it.

From then on, Yang started to search for meteorites and study their scientific values. "Every single meteorite has its unique code in the universe," said Yang.

Yang records the location when she finds a meteorite. [Photo provided to chinadaily.com.cn]