As human beings enter the 21st century, rapid changes and progress have occurred in various scientific fields, especially in the field of medicine. On the one hand, a large number of new technologies and new medical methods are constantly emerging; On the other hand, some new medical concepts, such as systemic medicine, translational medicine, precision medicine, integrative medicine and 4P [that is, preventive, predictive, personalized and participatory] medical models have emerged one after another, challenging traditional medical theories and concepts. These speculations and practices about medicine are promoting the progress of medicine.