Because this is a house call. Qi Li Qiang, male, deputy chief physician, attending physician, doctor of medicine in university of groningen, Netherlands, has an average annual outpatient volume of 10000, and more than 600 in-patient operations. 20 18 was transferred to the Department of Breast Surgery, Cancer Hospital of China Academy of Medical Sciences (National Cancer Center). On August 14, 2022, Professor Qi made a house call and performed surgery in the Department of Mammography, Fendong Hospital, Peking University Hospital, and hired an external expert.