Wrong. In the theory of traditional Chinese medicine, cold food is only the root cause of some diseases, but it does not represent the root cause of all diseases. Cold food, a common word in ancient poetry, occurs one or two days before Qingming. It is said that during the Spring and Autumn Period, Duke Wen of Jin was recommended by his hero Jie. Eat cold food. Eat it cold. Refers to the cold food eaten during the Cold Food Festival.