The population of the endangered big cats is rising again in Northeast China, as the animals travel south for prey. Su Zhou reports from Suiyang county, in Heilongjiang.
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Li Gang has had two close shaves with rare, wild tigers.
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As a forest ranger in Heilongjiang province, he has spent the last six years patrolling the protection zones for big cats, removing poachers' traps and checking on the monitoring cameras.
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"Once, after I collected a memory card from a camera, I checked the footage and discovered a tiger had passed by just a minute before I arrived," said the 35-year-old. "If I'd have been just a few moments earlier, I'd have come face to face with it."
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Despite not seeing one in the flesh, Li has developed an attachment to the big cats through photographs and videos. "I miss them if I don't see them on camera for a while. I think about where they go, or if it snows, about whether they have enough food."
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Li, who patrols his native Dongning county, is among the many villagers of Heilongjiang and Jilin - two provinces in Northeast China with long traditions of hunting - who are devoted to protecting Siberian tigers, also known as Amur tigers. And their efforts appear to be paying off.
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Wildlife studies show the endangered species, which all but disappeared from China for decades, is making a comeback in the northeast.Â