Green tea is easily oxidized and its freshness is reduced, so it is best to store it at low temperatures. 

Put the tea leaves into a clean, dry iron can, fill it as full as possible without leaving any space, seal the lid, 

cover it with several layers of fresh-keeping bags and put it in the refrigerator compartment.

Be careful not to store other foods with strong odor in the refrigerator. The quality of green tea can be effectively maintained by refrigeration. 

There is no need to freeze the tea leaves to prevent them from changing due to heat when the tea leaves are taken out.