First, the ditch method. After the onions are harvested, they are allowed to air for several hours in situ. The soil on the roots is removed, and the diseased plants and injured plants are removed. The bundles are weighed about 10 kg per bundle, and are piled in a well-ventilated place for about 6 days to make the green onions dry. Choose trenches with ventilation at the back of the shade. The depth of the trench is about 30 cm, and the width is about 150 cm. The length depends on the amount of welsh onions and the distance between trenches is 50-70 cm. If the bottom of the ditch has low humidity, it can be poured once. After the water is completely infiltrated, bundle a bunch of green onions into a ditch and bury the light blue part with soil. It is best to use a 30-35 cm long corn stalk to insert a circle around the ditch. Before the arrival of the cold, cover it with straw or straw and store it in March of the following year. Second, the burial method. Place the processed green onions on a shady corner or in a shady room covered with a layer of wet soil, and bury the soil around the green onions to the onion leaves. If it is buried outdoors, it can be covered with antifreeze grass before the cold begins. Third, the dry method. When the onions to be processed are 70% dry, tie each onion weight about 1 kilogram, and put the single layer in a dry and ventilated place. Pay attention to heat and moisture during storage. Fourth, the hollow Tibetan method. In the area where the terrain is high, flat, and convenient for drainage, the scallop roots are arranged in rows and hollowed out inwards. In order to prevent the collapse of earthworms, when each pile is 7-8 centimeters high, several small bamboo grasshoppers are placed horizontally and vertically, which in turn reach a height of 2-3 meters. The roof covers the grass to prevent rain. Fifth, erection method. After drying, the selected green onions are bundled into onion bales weighing about 5 kilograms each, and the single layer is discharged on the storage rack. China Agricultural Network Editor