The researchers developed a new method using Landsat images to track changes in the tree line in Wuyishan National Park due to climate change. By analyzing data from 1987 to 2018, they found that the tree line shifted upwards by 50 meters with a 1°C temperature increase. The method accurately identified the timber line, showing how slope, elevation, and aspect influenced local variations in tree line movement. This study provides valuable insights into how the alpine tree line in a subtropical region responds to global warming, offering important information for ecosystem management.