Dry sand can be kept dry, protected from moisture, and can be preserved for a longer time without being eroded by insects. This is because sand itself is a dry substance, which can effectively isolate moisture and moisture. Burying ginger in dry sand can prevent ginger from being exposed to damp environment, thus preventing ginger from getting wet, sprouting or rotting. At the same time, dry sand will not attract insects, which can prevent ginger from being invaded by pests.