古老银杏 韵传古今（和古树做朋友）

Core Viewpoint - The ancient ginkgo tree in Juxian County, Shandong, is highlighted as a cultural and historical symbol, showcasing the importance of tree preservation and the efforts made to protect it [4][5]. Group 1: Cultural Significance - The ancient ginkgo tree is located in the Dinglin Temple, which is part of a national 4A tourist attraction and serves as a historical museum [3]. - The tree is associated with historical figures, including Liu Xie, a renowned literary theorist, whose work has influenced literature for over a thousand years [4]. Group 2: Preservation Efforts - Juxian County has implemented a tree protection system that includes supplementary surveys, record-keeping, and protective signage [4]. - Li Jianguo, a dedicated caretaker, has been tending to the ginkgo tree since 2014, performing essential maintenance tasks such as watering and pest control [5]. Group 3: Detailed Monitoring - Li Jianguo maintains a "Big Tree Diary" documenting the tree's growth stages and environmental conditions, which aids in expert assessments and care strategies [5]. - The ginkgo tree has seen an increase in fruit production due to improved pollination from surrounding ginkgo trees planted in recent years [5]. Group 4: Botanical Information - Ginkgo biloba, also known as the maidenhair tree, is a large deciduous tree that can reach heights of up to 40 meters and is valued for its ornamental and economic uses [6][8]. - Ginkgo trees are ancient, dating back 345 million years, and are unique to China, with all existing ginkgo trees worldwide originating from this region [6].