The crested ibises, known as the "Oriental Gem," have existed for over 60 million years, longer than the history of humanity. Unfortunately, they almost went extinct around 40 years ago. But hope was not lost! In 1981, seven wild crested ibises were found in Yangxian Country in central China's Shaanxi Province. This discovery was monumental, as they were thought to be the last remaining specimens in the world. Through four decades of dedicated efforts, the population has rebounded significantly, from seven to over 11,000. But why were they in Yangxian County? What's so special about this place? What did the conservationists do to boost the population?