He has been engaged in clinical, scientific research and teaching of integrated traditional Chinese and western medicine for nearly 30 years and has rich clinical experience. He is a well-known expert in the field of Chinese medicine nephropathy and Chinese medicine health care sub-health. He is good at treating chronic nephritis, urinary tract infection, refractory nephrotic syndrome, IgA nephropathy, chronic prostatitis, diabetic nephropathy, henoch-schonlein purpura nephritis, gouty nephropathy and other primary and secondary nephropathy and difficult diseases in internal medicine, and is good at TCM constitution and sub-health conditioning. It has a good reputation among patients. In the past ten years, he has devoted himself to the research of TCM health preservation, and has created a personalized health preservation plan of Dr. Cao's Five Steps of Health Preservation with strong pertinence, maneuverability and practicability, which has been highly praised by domestic colleagues and widely praised by the public.