Don’t cheat. Li Tiejun, Master of Medicine, chief physician, postgraduate tutor. Vice Chairman of Liaoning Provincial Society of Preventive Medicine. Obtained 4 national freezing patents and is in the process of industrialization. One first prize and one second prize each for new hospital technologies. Invented quantified freezing and implemented freezing methods to treat common skin diseases. Freezing technology is in a leading position in the country. Dalian Li Tiejun has been engaged in clinical work in internal medicine for more than 20 years. He has solid professional basic knowledge and rigorous work attitude, and has many years of clinical work experience in tertiary hospitals. Clinically, he is good at the diagnosis and treatment of common diseases, frequently-occurring diseases, difficult diseases, and critical emergencies, especially cardiovascular diseases such as hypertension, coronary heart disease, hyperlipidemia, and heart failure, as well as diabetes, chronic obstructive pulmonary disease, digestive system diseases, etc. He has certain experience in the diagnosis and treatment of chronic diseases in the elderly.