Sometimes, it’s warm, sometimes it suddenly becomes very cold again, with raining and snowing. When it’s hot, we would think that it would be okay if colder, even too cold is okay; but when it’s very cold, we would think that it would be good if warmer, even too warm is okay. I remembered what uncle told us before, we should sweat a little in the summer, and be a lit cooler in the winter. It would not be good if you stay in a room with air conditioner for too long. However, even if it’s cold, we can still do more exercises to warm up ourselves, and it’s very rare to be too hot, so that this problem is easy to solve.