Why the campus of Peking University can be a shelter for so many wildlife？

Located in the bustling neighborhood of Haidian District, Beijing, the campus of Peking University (PKU) is home to more than 600 types of vegetation and 230 types of birds. It was also included in Global Biodiversity Conservation Best Practices 100+ in 2021. Let's walk into the campus to find out why it can be a paradise of plants and animals.