What should I do if the weather suddenly turns cold in the south and I am thin and afraid of the cold?

I'm here in Shanghai, and I don't know if it's near you. The temperature is not high these days, and the temperature difference between day and night is quite large. I must wear a thick coat in the morning. Now the seasons change, and it is easy to catch a cold. It is better to keep warm, and it will get colder and colder in the future. It's always right to buy something cold in advance. I recently bought a mini heater, made by Netease. At night, when the temperature is low, I will put it aside to keep warm, and sometimes I will sit for an hour or two at work. A heater is a life-saving medicine. In addition to wearing more clothes, you can also buy some small heaters, hot water bottles and other heating gadgets.