Sandstorm, by Liu Chaohong. [Photo/artron.net]

Sandstorms occur

Grain Rain falls between the end of spring and the beginning of summer, with infrequent cold air moving to the southand lingering cold air in the north. From the end of April to the beginning of May, the temperature rises much higher than it does in March. With dry soil, an unsteady atmosphere and heavy winds, gales and sandstorms become more frequent.