When it comes to sustainable development in China, there's a popular saying: "Green mountains and clear waters are as valuable as gold and silver." The words came from Chinese President Xi Jinping 15 years ago in Anji, a county in east China's Zhejiang Province. Today, Anji has set an example for the country with its sustainable growth model led by tourism. CGTN's Xu Mengqi visited the county and tells us more about the changes that have taken place there.