Group 1 - The core viewpoint of the articles is the completion of a significant ecological project in the Tengger Desert, which involves a 153-kilometer "green chain" to combat desert expansion and protect the Yellow River [1][2] - The project is part of a broader initiative to manage desertification in China, emphasizing the importance of not eliminating deserts but rather managing their expansion [2][3] - The Ningxia region has successfully retreated the Tengger Desert by 25 kilometers over the past decades through various ecological projects, including the "Three-North" program [2][3] Group 2 - The locking technique involves using grass grids to stabilize shifting sands, which has proven effective in preventing desert encroachment [3][4] - Innovative technologies are being employed, such as a specialized planting tool that increases the survival rate of saplings in sandy conditions from 60% to over 80% [4] - Future plans include enhancing cooperation with Inner Mongolia for joint ecological management and developing sustainable industries like desert tourism and solar energy [5][6]