What do you mean, hot and cold?

It means that the climate is hot and cold, hot and cold.

It's an idiom in China, and its pinyin is zh à nu m ǐ n hu á n h á n h á n h á n. It's from Li Qingzhao's Slow Whispering.

When it is warm and cold, you can generally keep healthy through diet and sleep. There are many foods that can tonify yang, such as boiled ginger and brown sugar, which can relieve exterior symptoms, dispel cold and tonify yang, spinach and leek have nourishing effects, and dog meat and mutton are all good things to tonify yang. Early spring, short days and long nights. When sleeping, the yang will enter the yin, and the yin and yang will be harmonious. When sleeping, all constitutions can be restored.

For the "spring cover", the doctor's advice is to pay attention to the two ends of the "cover", that is, to focus on the two ends of the "first foot". Because the weather is warm and cold in early spring, the humidity is high, the temperature is low in the morning and evening, bacteria and viruses are active, and people are prone to get sick. Paying attention to "covering" the head, neck and feet can avoid diseases such as colds, tracheitis and arthritis. Cold starts from the bottom, and traditional health care advocates that clothes should be "thick under and thin on" in spring, because the blood circulation of the lower body is worse than that of the upper body and it is easy to catch cold. Women changing skirts too early will lead to arthritis and various gynecological diseases. Spring is also the season of epidemic diseases such as meningitis, measles and mumps. Although the occurrence of these diseases is related to bacterial and viral infections, whether they occur after infection depends largely on a person's physique and daily life.