A female giant panda born in captivity and released into the wild has been filmed four years later looking well and acting wild—in new territory.

It's the first time a captive-born panda has crossed boundaries into another reserve, providing welcome relief for conservationists who have struggled to reintroduce the famous species back into its native China.

Zhang Xiang, which means The Thoughtful One, was also the first female panda set free under China’s breed-and-release program, which has so far introduced seven pandas into the wild. Two have died.

In 2013, officials popped open Zhang Xiang's crate and watched her amble to freedom inside Liziping Nature Reserve, in the mountains of China’s Sichuan Province. (Read about pandas returning to the wild