Why do onions have to be packed before the autumnal equinox?

Afraid of losing water The autumnal equinox is the sixteenth of the twenty-four solar terms, and the time is from September 22 to 24 of the Gregorian calendar every year. In this solar term, onions are afraid of losing water, so they need to be packed, so the survival rate of onions is very high when they are planted. Onion refers to the kind of scallion cake eaten by northerners. It is spicy and choking, and many people are not used to it.