1. Old ginger refers to the ginger that has been harvested and new ginger refers to the ginger that has just been harvested. Ginger has a longer growth cycle and needs more time and resources to mature, so it is relatively scarce, so the price will be higher.

2. After a period of storage and treatment, the moisture content of ginger is lower, which makes ginger more storable and has a longer taste and spicy taste. However, due to the high water content and easy decay, new ginger needs more attention and treatment in the process of sales and transportation, which also leads to the low price of new ginger.