Villagers install tall sand barriers along with straw checkerboard barriers in a desert area of Yongfeng village, Jinta county, Jiuquan, Northwest China's Gansu province, on March 3. [Photo provided to gogansu.com]

On March 3, in a desert section of Yongfeng village, Jinta county, Jiuquan, Gansu province, villagers were installing tall sand barriers along with straw checkerboard barriers to form a "green Great Wall."

According to officials, the tall vertical sand barriers primarily serve to block wind. When wind passes through these elevated barriers, its velocity significantly decreases, thereby reducing the amount of sand carried by the wind. The straw checkerboard barriers and tall sand barriers are installed at specific intervals to create an effective sand stabilization system, which effectively prevents dune migration and reduces wind erosion in surrounding areas.