We should choose mulberry leaves in late autumn or winter and clean them after picking. Then we classify mulberry leaves and distinguish bud tips from other parts. Then we put the mulberry leaves in boiling water to inactivate enzymes, and then take them out and rub them until the water in the mulberry leaves is wiped dry. Then we put the mulberry leaves in a pot and fry them with low fire until they are fragrant, and then take them out to dry. Finally, we will save the sun-dried mulberry leaves for brewing frosted mulberry leaf tea in the future.