You can wear 10 years, 20 years, 50 years, depending on whether it's the front teeth or the back teeth, and whether you want to be beautiful or not. If the posterior teeth can be made of cobalt-chromium cast steel crown, it is really cheap, and 240 yuan can wear one for 50 years. The price you mentioned may be a porcelain crown. If it is a cobalt-chromium porcelain crown, it is not expensive. Let's see what material it is.