The pilot project of ecological restoration of mountains, rivers, forests, fields, lakes and pastures in the Ulansuhai Nur Basin in Inner Mongolia is the largest of its kind in terms of the area of desert to be restored. China Construction First Group Corporation Limited has applied the "4233" construction mode in ecological restoration work. Once completed, the project can prevent one million cubic meters of sand from entering the Yellow River each year and help 37,000 poor people in the Yellow River basin out of poverty and become rich, which is of great significance to sustainable development and ecological progress. China Construction First Group Corporation Limited has paved grids of rice and wheat straw squares, which, supplemented by polylactic acid (PLA) sand barriers, help control desert effectively. Straw square paving equipment has also been introduced to increase the work efficiency by more than twice and drones have been used for aerial reforestation on over 10,000 mu of land.