In this video, the journalists went inside China's Northeast Tiger Leopard National Park and recorded the footprints of the tigers and leopards.
The national park covers more than 1.46 million hectares in the provinces of Jilin and Heilongjiang, and borders Russia and the Democratic People's Republic of Korea.
Thanks to government efforts, the population of Siberian tigers and Amur leopards has increased.
Now, Let's enjoy and have a look into their secret lives.
(Video source: CCTV; compiled by Xu Zheqi)