China has completed a major ecological project to combat desertification by establishing a sand-fixing and desert-edge containment barrier along the southeastern edge of the Tengger Desert in Northwest China's Ningxia Hui Autonomous Region. The protective belt stretches approximately 153 kilometers in length and ranges from 10 to 38 kilometers in width. This project marks the full encirclement of the Tengger Desert, China's fourth-largest desert, within Ningxia's jurisdiction, effectively halting the desert's eastward expansion. The initiative involved over 50 years of continuous sand control efforts, including the use of the "straw checkerboard" dune stabilization technique. The barrier aims to protect the Yellow River, improve regional ecological conditions, and represents the locking down of the last mobile sand dunes in the area. Following this milestone, China also completed a 1,856-kilometer green barrier belt across three major deserts in Inner Mongolia—the Badain Jaran, Tengger, and Ulan Buh deserts—to further prevent desert encroachment. These projects are part of China's broader desertification control efforts, which include transforming barren desert land into arable farmland and wetlands, with ongoing applications of innovative farming and ecological water diversion techniques in regions such as Xinjiang and Qinghai provinces.