Renji, Shuningkang and Bo Er are all small hospitals. I don't know their sanitary conditions, but it was better when I took the exam as a medical practitioner last year. But I still suggest going to a bigger hospital, because it is safer. Doctors in big hospitals have more medical records and rich experience. Although the price is a bit expensive, the teeth you want to see are still cosmetic. If it is replaced by a posterior tooth, it can still be considered. Think for yourself!