What to wear to Shanxi and Anhui in March?

Down jackets go to Anhui, Shanxi in March, and the temperature difference between day and night is large. The maximum temperature can reach 20 degrees during the day and 2 degrees at night. It's cold in the morning and at night, so you need to keep healthy when traveling, so you need to wear down jacket to keep warm. Down coat A coat filled with down stuffing is big and round.