This aerial photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Jigme Dorje)

This photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Jigme Dorje)

This aerial photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Jigme Dorje)

This photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Fei Maohua)

This photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Fei Maohua)

This photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Fei Maohua)

This aerial photo taken on May 28, 2023 shows stone matrix along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Jigme Dorje)

This photo taken on May 28, 2023 shows a part of stone grids along a highway in Zhaxigang Township of Gar County in Ngari Prefecture, southwest China's Tibet Autonomous Region. The stone grids, which took local villagers three years to build, play a role in protecting the winter pasture from wind and sand damage, according to Sonam Cering, deputy head of Zhaxigang Township. (Xinhua/Jigme Dorje)