Every day, Duan Lianru spends several hours sitting in her office in Hunchun, Jilin province to make comparisons of hundreds of photos of Siberian tigers on the computer.

"It seems a little boring, but I really enjoy the work, which makes an intangible connection between me and the big cats," said the 36-year-old monitor from the research monitoring center of Hunchun bureau of the Northeast China Tiger and Leopard National Park. The park stretches across the provinces of Jilin and Heilongjiang.

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