When a 69-year-old woman was pushed into the ward by her family in a wheelchair, when you know that she has not been out of the house for 3 years and has not been able to leave the wheelchair for a year, when you see the haggard face of the old man, full of expectations, when her children hold your hands tightly, almost as if they are thirsting for it, then you become the savior of the world, that kind of pride in medical care, and that heavy responsibility does not come to you. When you tell the elderly double knee artificial joint replacement, she can walk normally, but also can buy food, cooking and even go out to travel, the old man’s face is still full of suspicion, the mouth can not stop muttering “can stand, do not hurt on the line”. A week later, the old man walking on the ground with the help of crutches, face showing a long-lost smile, half a month when the old man was discharged from the hospital does not need a wheelchair, help walker can walk, at that time she was full of bright face, full of mouth is thank you. Three months later, the old man in the company of his family to walk to the follow-up, then she, there is a smile on her face, mouth shouting regret, regret three years ago did not listen to the doctor’s words early surgery, suffered three years of crime, then you, there is from the heart of the pride of this profession. When a 36-year-old hobbling to the clinic, please sit and can not sit in front of you, you realize that he does not know the taste of sitting for two years, he suffers from ankylosing spondylitis, bilateral hip joints have been ankylosis, when you learn that he is a key university graduates engaged in the IT industry and successful career has its own company, but can not take their own cars, can only stand in the van when commuting to and from work, you are so shocked, when you know that he can only stand in the office, you are so shocked. When you know that he can only stand in the office, stand to eat, lie down to urinate and defecate, the spirit of the near collapse, you feel how happy to be a normal person. Three months later, when he could sit in the office, eat, take a walk, and drive his own car to come to see you, he clasped your hand and couldn’t stop saying, “Replacing the joints not only improves my life, but also saves my life”. In fact, there is nothing mysterious about artificial joint replacement, just like the current dental technology, replacing the aged and damaged tissues with artificial materials, so as to restore their functions, there are 500,000 cases of artificial joint replacement in the United States every year, and nearly 200,000 cases in China every year. Our hospital has been engaged in artificial hip replacement for more than 30 years and total knee replacement for 15 years, and has performed more than 3,000 cases of this kind of surgery, which is a very mature technology. The Department of Orthopaedics and Joints has always put the most emphasis on joint replacement, striving to make a fine product out of one operation, and has formulated a complete set of specifications from pre-operative evaluation to intra-operative refinement, personnel cooperation, perioperative management, post-operative analgesia, rehabilitation exercises, follow-up, etc., so as to make the satisfaction rate of the operation reach more than 99%.