What clothes are suitable for Hangzhou 20 degrees?

There is a long-sleeved T-shirt inside and a thin coat outside. There is a T-shirt inside and a sweater outside. According to the information of Hangzhou local treasure, the temperature of 20 degrees in Hangzhou is quite suitable. Wear a T-shirt at noon and add a coat in the morning and evening. The weather around 20 degrees, whether cold or hot, is a casual temperature that people wear. Only when you wear the right clothes will you feel comfortable.