Abstract:The Beijing Library, about one li west of Beijing Baishi Bridge, was one of the top ten buildings in Beijing in the 1980s. Here used to be the site of Zhenguo Temple in yuan Dynasty. On the site, there are two towering ancient ginkgo trees with a trunk diameter of about 1.5 meters and a tree age of about 500 or 600 years. In the construction of Beijing Library project, they were preserved intact through the efforts of the construction team.