According to statistical data about the number of days when a sandstorm was generated in the area from Dunhuang City to Hexi Corridor, slightly less than 50 percent of the occurrences were concentrated in the three months of spring.
敦煌市から河西回廊での砂塵嵐の日数を調べた統計では、春の3ヶ月間に年間の5割弱が集中する。